1381
Everything about the number 1381 — its names, how to write it in other bases and numeral systems, and what makes it interesting mathematically.
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Names of 1381
| Nominal | 1381 |
| Cardinal | one thousand three hundred eighty-one |
| Ordinal | 1,381st |
| This number as US currency | one thousand three hundred eighty-one dollars |
Properties (and some facts) of 1381
| Is 1381 an odd number? | 1381 is an odd number |
| Is 1381 an even number? | 1381 is not an even number |
| Is 1381 a palindrome? | 1381 is not a palindrome |
| Is 1381 a triangle number? | 1381 is not a triangle number |
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1381 in other bases
| Base 2 (Binary) | 10101100101 |
| Base 3 (Ternary) | 1220011 |
| Base 4 (Quaternary) | 111211 |
| Base 5 (Quinary) | 21011 |
| Base 6 (Senary) | 10221 |
| Base 8 (Octal) | 2545 |
| Base 12 (Duodecimal) | 971 |
| Base 16 (Hexadecimal) | 565 |
| Base 20 (Vigesimal) | 391 |
Primes and factors tests for 1381
| Is 1381 a prime number? | 1381 is a prime number |
| Is 1381 a perfect number? | 1381 is not a perfect number |
| Is 1381 a Mersenne prime? | 1381 is not a Mersenne prime |
| Is 1381 a Fermat prime? | 1381 is not a Fermat prime |
| Is 1381 a Fibonacci prime? | 1381 is not a Fibonacci prime |
| Is 1381 a partition prime? | 1381 is not a partition prime |
| Is 1381 a Pell prime? | 1381 is not a Pell prime |
| Prime Factors | Prime factors of 1381 |
1381 in other numeral systems
| 1381 in Roman numerals | MCCCLXXXI |
| 1381 in Chinese numerals | 壹仟叄佰捌拾壹 |
| 1381 in Babylonian numerals |   |
| 1381 in Egyptian numerals | 𓆼𓍤𓎍𓏺 |
Roots and squares for 1381
| Is 1381 a square number? | 1381 is not a square number |
| Is 1381 a cube number? | 1381 is not a cube number |
| Square root of 1381 | 37.161808352124 |
| Cube root of 1381 | 11.136051383973 |
Recreational math for 1381
| Number 1381 reversed | 1831 |
| Sum of the digits | 13 |
| Number of digits | 4 |
Arithmetic tables for 1381
Other pages about 1381
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