1000 (number) Guide, Meaning , Facts, Information and Description
1000 is the natural number following 999 and preceding 1001. Prefixes for 1000 include chilia- (Greek) and mill- (Latin).
| Cardinal | One thousand |
| Ordinal | 1000th |
| Factorization | |
| Roman numeral | M |
| Binary | 1111101000 |
| Hexadecimal | 3E8 |
In scientific notation, one thousand is written as 103. The SI prefix for a thousand is "kilo-".
The Roman numeral for thousand is M (for mille).
See also: millennium, year 1000 AD
;1001 - sphenic number, pentagonal number
;1002 - sphenic number, Mertens function zero
;1005 - Mertens function zero
;1008 - divisible by the number of primes below it
;1010 - Mertens function zero
;1013 - Sophie Germain prime, centered square number, Mertens function zero
;1014 - Mertens function zero
;1015 - square pyramidal number
;1018 - Mertens function zero
;1019 - Sophie Germain prime, safe prime
;1024 - power of two, 32^2
;1027 - sum of the squares of the first eight primes
;1031 - Sophie Germain prime
;1035 - triangular number, hexagonal number
;1049 - Sophie Germain prime
;1051 - centered pentagonal number
;1056 - pronic number
;1060 - sum of the first 25 primes
;1071 - heptagonal number
;1079 - Every positive integer is the sum of at most 1079 tenth powers.
;1080 - pentagonal number
;1081 - triangular number
;1086 - Smith number
;1089 - 33^2, nonagonal number
;1092- divisible by the number of primes below it
;1093 - star number
;1103 - Sophie Germain prime
;1104 - Keith number
;1105 - Carmichael number, magic constant of nxn magic square and n-Queens Problem for n = 13, decagonal number, centered square number
;1116 - divisible by the number of primes below it
;1122 - pronic number, divisible by the number of primes below it
;1128 - triangular number, hexagonal number, divisible by the number of primes below it
;1134- divisible by the number of primes below it
;1138 - special code for Easter eggs on Star Wars DVDs, because of George Lucas's movie THX-1138
;1140 - tetrahedral number
;1152 - highly totient number
;1156 - 34^2, octahedral number, centered pentagonal number
;1161 - sum of the first 26 primes
;1162 - pentagonal number
;1176 - triangular number
;1177 - heptagonal number
;1184 - amicable number with 1210
;1187 - safe prime
;1190 - pronic number
;1201 - centered square number
;1210 - amicable number with 1184
;1216 - nonagonal number
;1219 - Mertens function zero
;1220 - Mertens function zero
;1223 - Sophie Germain prime
;1225 - triangular number, 35^2, triangular square number, hexagonal number
;1229 - Sophie Germain prime
;1233 - 12^2 + 33^2
;1240 - square pyramidal number
;1241 - centered cube number
;1242 - decagonal number
;1247 - pentagonal number
;1255 - Mertens function zero
;1256 - Mertens function zero
;1258 - Mertens function zero
;1260 - highly composite number, pronic number, vampire number
;1261 - star number, Mertens function zero
;1264 - sum of the first 27 primes
;1266 - centered pentagonal number, Mertens function zero
;1270 - Mertens function zero
;1279 - Mertens function zero
;1280 - Mertens function zero
;1282 - Mertens function zero
;1283 - safe prime
;1285 - Mertens function zero
;1288 - heptagonal number
;1289 - Sophie Germain prime, Mertens function zero
;1291 - Mertens function zero
;1292 - Mertens function zero
;1296 - 36^2, fourth power of 6, sum of the cubes of the first eight integers
;1297 - Mertens function zero
;1299 - Mertens function zero
;1300 - Mertens function zero
;1301 - centered square number
;1302 - Mertens function zero
;1306 - Mertens function zero
;1307 - safe prime
;1318 - Mertens function zero
;1319 - safe prime
;1326 - triangular number, hexagonal number, Mertens function zero
;1329 - Mertens function zero
;1330 - tetrahedral number
;1331 - cube of 11
;1332 - pronic number
;1335 - pentagonal number, Mertens function zero
;1336 - Mertens function zero
;1338 - Mertens function zero
;1342 - Mertens function zero
;1350 - nonagonal number
;l367 - safe prime
;1369 - 37^2
;1371 - sum of the first 28 primes
;1378 - triangular number
;1379 - magic constant of nxn magic square and n-Queens Problem for n = 14.
;1381 - centered pentagonal number
;1387 - super-Poulet number, decagonal number
;1395 - vampire number
;1404 - heptagonal number
;1405 = 26^2 + 27^2 = 7^2 + 8^2 + ... + 16^2, centered square number
;1406 - pronic number, semi-meandric number
;1409 - Sophie Germain prime
;1419 - Zeisel number
;1426 - pentagonal number
;1431 - triangular number, hexagonal number
;1435 - vampire number
;1439 - Sophie Germain prime, safe prime
;1440 - square pyramidal number
;1441 - star number
;1444 - 38^2
;1451 - Sophie Germain prime
;1469 - octahedral number
;1470 - pentagonal pyramidal number
;1480 - sum of the first 29 primes
;1481 - Sophie Germain prime
;1482 - pronic number
;1485 - triangular number
;1487 - safe prime
;1490 - tetranacci number
;1491 - nonagonal number, Mertens function zero
;1492 - Mertens function zero
;1496 - square pyramidal number
;1499 - Sophie Germain prime
;1501 - centered pentagonal number
;1511 - Sophie Germain prime
;1513 - centered square number
;1518 - Mertens function zero
;1519 - Mertens function zero
;1520 - pentagonal number, Mertens function zero
;1521 - Mertens function zero, 39^2
;1523 - Mertens function zero, safe prime
;1524 - Mertens function zero
;1525 - heptagonal number, Mertens function zero
;1527 - Mertens function zero
;1528 - Mertens function zero
;1530 - vampire number
;1531 - Mertens function zero
;1532 - Mertens function zero
;1537 - Keith number, Mertens function zero
;1540 - triangular number, hexagonal number, decagonal number, tetrahedral number
;1543 - Mertens function zero
;1544 - Mertens function zero
;1546 - Mertens function zero
;1556 - sum of the squares of the first nine primes
;1559 - Sophie Germain prime
;1560 - pronic number
;1575 - odd abundant number
;1583 - Sophie Germain prime
;1593 - sum of the first 30 primes
;1596 - triangular number
;1597 - Fibonacci number
;1600 - 40^2, street number on Pennsylvania avenue of the White House
;1601 - Sophie Germain prime, the novel 1601 (Mark Twain)
;1617 - pentagonal number
;1619 - safe prime
;1625 - centered square number
;1626 - centered pentagonal number
;1633 - star number
;1638 - harmonic divisor number
;1639 - nonagonal number
;1640 - pronic number
;1651 - heptagonal number
;1653 - triangular number, hexagonal number
;1657 - cuban prime
;1680 - highly composite number
;1681 - 41^2, smallest number yielded by the formula n^2 + n + 41 that is not a prime
;1695 - magic constant of nxn magic square and n-Queens Problem for n = 15.
;1701 - decagonal number, hull number of the Starship Enterprise on Star Trek
;1705 - tribonacci number
;1711 - triangular number
;1717 - pentagonal number
;1720 - sum of the first 31 primes
;1722 - Giuga number, pronic number
;1728 - cube of 12 and so is the number of cubic inches in a cubic foot
;1729 - taxicab number, Carmichael number, Zeisel number, centered cube number. In the decimal expansion of , the first time all 10 digits appear in sequence starts at the 1729th decimal place. Trivia: In 1979 the rock musical Hair closed on Broadway in New York City after 1729 performances.
;1733 - Sophie Germain prime
;1741 - centered square number
;1756 - centered pentagonal number
;1764 - 42^2
;1770 - triangular number, hexagonal number, Town of Seventeen Seventy in Australia
;1771 - tetrahedral number
;1782 - heptagonal number
;1785 - square pyramidal number
;1794 - nonagonal number
;1800 - pentagonal pyramidal number, also, in da Ponte's Don Giovanni, the number of women Don Giovanni had slept with so far when confronted by Donna Elvira, according to Leporello's tally
;1801 - cuban prime
;1806 - pronic number
;1811 - Sophie Germain prime
;1820 - pentagonal number
;1823 - safe prime
;1827 - vampire number
;1828 - meandric number, open meandric number
;1830 - triangular number
;1834 - octahedral number, sum of the cubes of the first five primes
;1837 - star number
;1841 - Mertens function zero
;1843 - Mertens function zero
;1844 - Mertens function zero
;1845 - Mertens function zero
;1849 - 43^2
;1851 - sum of the first 32 primes
;1853 - Mertens function zero
;1854 - Mertens function zero
;1857 - Mertens function zero
;1861 - centered square number, Mertens function zero
;1862 - Mertens function zero
;1863 - Mertens function zero
;1864 - Mertens function zero
;1866 - Mertens function zero
;1870 - decagonal number
;1885 - Zeisel number
;1889 - Sophie Germain prime
;1891 - triangular number, hexagonal number, centered pentagonal number
;1892 - pronic number
;1901 - Sophie Germain prime
;1907 - safe prime
;1918 - heptagonal number
;1926 - pentagonal number
;1929 - Mertens function zero
;1931 - Sophie Germain prime
;1936 - 44^2
;1938 - Mertens function zero
;1951 - cuban prime
;1953 - triangular number
;1956 - nonagonal number
;1969 - the movie 1969 (movie)
;1973 - Sophie Germain prime
;1980 - pronic number
;1984 - see 1984 (disambiguation)
;1985 - centered square number
;1988 - sum of the first 33 primes
This is an Article on 1000 (number). Page Contains Information, Facts Details or Explanation Guide About 1000 (number) Selected numbers in the thousands (1000-1999)