Names of 401
| Nominal | 401 |
| Cardinal | four hundred one |
| Ordinal | 401st |
| This number as US currency | four hundred one dollars |
| Is 401 an odd number? | 401 is an odd number |
| Is 401 an even number? | 401 is NOT an even number |
| Is 401 a palindrome? | 401 is NOT a palindrome number |
| Is 401 a triangle number? | 401 is NOT a triangle number |
401 in other Bases
| Base 2 (Binary) | 1100100012 |
| Base 3 (Ternary) | 1122123 |
| Base 4 (Quaternary) | 121014 |
| Base 5 (Quinary) | 31015 |
| Base 6 (Senary) | 15056 |
| Base 8 (Octal) | 6218 |
| Base 12 (Duodecimal) | 29512 |
| Base 16 (Hexadecimal) | 19116 |
| Base 20 (Vigesimal) | 10120 |
Primes and Factors tests for 401
| Is 401 a Prime Number? | 401 is a prime |
| Is 401 a perfect number? | 401 is NOT a perfect number |
| Is 401 a Mersenne Prime? | 401 is NOT a Mersenne prime |
| Is 401 a Fermat Prime? | 401 is NOT a Fermat prime |
| Is 401 a Fibonacci Prime? | 401 is NOT a Fibonacci prime |
| Is 401 a Partition Prime? | 401 is NOT a Partition prime |
| Is 401 a Pell Prime? | 401 is NOT a Pell prime |
| Prime Factors | Prime factors of 401 |
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401 in other Numerals
| 401 in Roman Numeral | CDI |
| 401 in Chinese Numeral | 肆佰壹 |
| 401 in Egyptian Numeral | 𓍥𓏺 |
| 401 in Babylonian Numeral |   |
Roots and stuff for 401
| Is 401 a square number? | 401 is NOT a square number |
| Is 401 a cube number? | 401 is NOT a cube number |
| Square root of the number 401 | 20.024984394501 |
| Cube root of the number 401 | 7.3741979401628 |
Recreational math for 401
| Number 401 reversed | 104 |
| Sum of the digits | 5 |
| No of digits | 3 |