42
Everything about the number 42 — its names, how to write it in other bases and numeral systems, and what makes it interesting mathematically.
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Names of 42
| Nominal | 42 |
| Cardinal | forty-two |
| Ordinal | 42nd |
| This number as US currency | forty-two dollars |
Properties (and some facts) of 42
| Is 42 an odd number? | 42 is not an odd number |
| Is 42 an even number? | 42 is an even number |
| Is 42 a palindrome? | 42 is not a palindrome |
| Is 42 a triangle number? | 42 is not a triangle number |
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42 in other bases
| Base 2 (Binary) | 101010 |
| Base 3 (Ternary) | 1120 |
| Base 4 (Quaternary) | 222 |
| Base 5 (Quinary) | 132 |
| Base 6 (Senary) | 110 |
| Base 8 (Octal) | 52 |
| Base 12 (Duodecimal) | 36 |
| Base 16 (Hexadecimal) | 2A |
| Base 20 (Vigesimal) | 22 |
Primes and factors tests for 42
| Is 42 a prime number? | 42 is not a prime number |
| Is 42 a perfect number? | 42 is not a perfect number |
| Is 42 a Mersenne prime? | 42 is not a Mersenne prime |
| Is 42 a Fermat prime? | 42 is not a Fermat prime |
| Is 42 a Fibonacci prime? | 42 is not a Fibonacci prime |
| Is 42 a partition prime? | 42 is not a partition prime |
| Is 42 a Pell prime? | 42 is not a Pell prime |
| Prime Factors | Prime factors of 42 |
42 in other numeral systems
| 42 in Roman numerals | XLII |
| 42 in Chinese numerals | 肆拾貳 |
| 42 in Babylonian numerals |  |
| 42 in Egyptian numerals | 𓎉𓏻 |
Roots and squares for 42
| Is 42 a square number? | 42 is not a square number |
| Is 42 a cube number? | 42 is not a cube number |
| Square root of 42 | 6.4807406984079 |
| Cube root of 42 | 3.4760266448864 |
Recreational math for 42
| Number 42 reversed | 24 |
| Sum of the digits | 6 |
| Number of digits | 2 |
Arithmetic tables for 42
Other pages about 42
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