Number 1381

1381 is prime.

1381 prime factorization is 1381¹

1381 prime factorization is 1381

Divisors (2): 1, 1381

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Properties#

1381 is 122nd additive prime because sum of its digits is 13 which is also prime
1381 is 144th chen prime
1381 is 64th emirps, its corresponding prime is 1831
1381 is 130th isolated prime
1381 is 86th long prime
1381 is 221st prime
1381 is 109th pythagorean prime

External#

Neighbours#

1369₁	1370	1371₁	1372	1373₇
1374	1375	1376	1377	1378
1379₁	1380	1381₇	1382₁	1383₁
1384	1385₁	1386	1387₁	1388
1389₁	1390	1391₁	1392	1393₁

Compare with#

1369₁	1370	1371₁	1372	1373₇
1374	1375	1376	1377	1378
1379₁	1380	1381₇	1382₁	1383₁
1384	1385₁	1386	1387₁	1388
1389₁	1390	1391₁	1392	1393₁

Different Representations#

1381 in roman numerals is MCCCLXXXI
1381 in base 2 is 10101100101₂
1381 in base 3 is 1220011₃
1381 in base 4 is 111211₄
1381 in base 5 is 21011₅
1381 in base 6 is 10221₆
1381 in base 7 is 4012₇
1381 in base 8 is 2545₈
1381 in base 9 is 1804₉
1381 in base 10 is 1381₁₀
1381 in base 11 is 1046₁₁
1381 in base 12 is 971₁₂
1381 in base 13 is 823₁₃
1381 in base 14 is 709₁₄
1381 in base 15 is 621₁₅
1381 in base 16 is 565₁₆

Belongs Into#

1381 belongs into first 500 additive primes.
1381 belongs into first 500 chen primes.
1381 belongs into first 100 emirpss.
1381 belongs into first 500 isolated primes.
1381 belongs into first 100 long primes.
1381 belongs into first 500 primes.
1381 belongs into first 500 pythagorean primes.

As Timestamp#

0 + 1 * 1381: Convert timestamp 1381 to date is 1970-01-01 00:23:01
0 + 1000 * 1381: Convert timestamp 1381000 to date is 1970-01-16 23:36:40
1300000000 + 1000 * 1381: Convert timestamp 1301381000 to date is 2011-03-29 06:43:20
1400000000 + 1000 * 1381: Convert timestamp 1401381000 to date is 2014-05-29 16:30:00
1500000000 + 1000 * 1381: Convert timestamp 1501381000 to date is 2017-07-30 02:16:40
1600000000 + 1000 * 1381: Convert timestamp 1601381000 to date is 2020-09-29 12:03:20
1700000000 + 1000 * 1381: Convert timestamp 1701381000 to date is 2023-11-30 21:50:00

You May Also Ask#

Smaller than 1381#

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