Names of 257
| Nominal | 257 |
| Cardinal | two hundred fifty-seven |
| Ordinal | 257th |
| This number as US currency | two hundred fifty-seven dollars |
| Is 257 an odd number? | 257 is an odd number |
| Is 257 an even number? | 257 is NOT an even number |
| Is 257 a palindrome? | 257 is NOT a palindrome number |
| Is 257 a triangle number? | 257 is NOT a triangle number |
257 in other Bases
| Base 2 (Binary) | 1000000012 |
| Base 3 (Ternary) | 1001123 |
| Base 4 (Quaternary) | 100014 |
| Base 5 (Quinary) | 20125 |
| Base 6 (Senary) | 11056 |
| Base 8 (Octal) | 4018 |
| Base 12 (Duodecimal) | 19512 |
| Base 16 (Hexadecimal) | 10116 |
| Base 20 (Vigesimal) | CH20 |
Primes and Factors tests for 257
| Is 257 a Prime Number? | 257 is a prime |
| Is 257 a perfect number? | 257 is NOT a perfect number |
| Is 257 a Mersenne Prime? | 257 is NOT a Mersenne prime |
| Is 257 a Fermat Prime? | 257 is a Fermat prime |
| Is 257 a Fibonacci Prime? | 257 is NOT a Fibonacci prime |
| Is 257 a Partition Prime? | 257 is NOT a Partition prime |
| Is 257 a Pell Prime? | 257 is NOT a Pell prime |
| Prime Factors | Prime factors of 257 |
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257 in other Numerals
| 257 in Roman Numeral | CCLVII |
| 257 in Chinese Numeral | 貳佰伍拾柒 |
| 257 in Egyptian Numeral | 𓍣𓎊𓐀 |
| 257 in Babylonian Numeral |   |
Roots and stuff for 257
| Is 257 a square number? | 257 is NOT a square number |
| Is 257 a cube number? | 257 is NOT a cube number |
| Square root of the number 257 | 16.031219541881 |
| Cube root of the number 257 | 6.3578611797342 |
Recreational math for 257
| Number 257 reversed | 752 |
| Sum of the digits | 14 |
| No of digits | 3 |