Names of 642
| Nominal | 642 |
| Cardinal | six hundred forty-two |
| Ordinal | 642nd |
| This number as US currency | six hundred forty-two dollars |
| Is 642 an odd number? | 642 is NOT an odd number |
| Is 642 an even number? | 642 is an even number |
| Is 642 a palindrome? | 642 is NOT a palindrome number |
| Is 642 a triangle number? | 642 is NOT a triangle number |
642 in other Bases
| Base 2 (Binary) | 10100000102 |
| Base 3 (Ternary) | 2122103 |
| Base 4 (Quaternary) | 220024 |
| Base 5 (Quinary) | 100325 |
| Base 6 (Senary) | 25506 |
| Base 8 (Octal) | 12028 |
| Base 12 (Duodecimal) | 45612 |
| Base 16 (Hexadecimal) | 28216 |
| Base 20 (Vigesimal) | 1C220 |
Primes and Factors tests for 642
| Is 642 a Prime Number? | 642 is NOT a prime |
| Is 642 a perfect number? | 642 is NOT a perfect number |
| Is 642 a Mersenne Prime? | 642 is NOT a Mersenne prime |
| Is 642 a Fermat Prime? | 642 is NOT a Fermat prime |
| Is 642 a Fibonacci Prime? | 642 is NOT a Fibonacci prime |
| Is 642 a Partition Prime? | 642 is NOT a Partition prime |
| Is 642 a Pell Prime? | 642 is NOT a Pell prime |
| Prime Factors | Prime factors of 642 |
Sponsored
642 in other Numerals
| 642 in Roman Numeral | DCXLII |
| 642 in Chinese Numeral | 陸佰肆拾貳 |
| 642 in Egyptian Numeral | 𓍧𓎉𓏻 |
| 642 in Babylonian Numeral |   |
Roots and stuff for 642
| Is 642 a square number? | 642 is NOT a square number |
| Is 642 a cube number? | 642 is NOT a cube number |
| Square root of the number 642 | 25.33771891864 |
| Cube root of the number 642 | 8.6267062366914 |
Recreational math for 642
| Number 642 reversed | 246 |
| Sum of the digits | 12 |
| No of digits | 3 |