642
Everything about the number 642 — its names, how to write it in other bases and numeral systems, and what makes it interesting mathematically.
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Names of 642
| Nominal | 642 |
| Cardinal | six hundred forty-two |
| Ordinal | 642nd |
| This number as US currency | six hundred forty-two dollars |
Properties (and some facts) of 642
| 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 |
| Is 642 a triangle number? | 642 is not a triangle number |
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642 in other bases
| Base 2 (Binary) | 1010000010 |
| Base 3 (Ternary) | 212210 |
| Base 4 (Quaternary) | 22002 |
| Base 5 (Quinary) | 10032 |
| Base 6 (Senary) | 2550 |
| Base 8 (Octal) | 1202 |
| Base 12 (Duodecimal) | 456 |
| Base 16 (Hexadecimal) | 282 |
| Base 20 (Vigesimal) | 1C2 |
Primes and factors tests for 642
| Is 642 a prime number? | 642 is not a prime number |
| 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 |
642 in other numeral systems
| 642 in Roman numerals | DCXLII |
| 642 in Chinese numerals | 陸佰肆拾貳 |
| 642 in Babylonian numerals |   |
| 642 in Egyptian numerals | 𓍧𓎉𓏻 |
Roots and squares 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 642 | 25.33771891864 |
| Cube root of 642 | 8.6267062366914 |
Recreational math for 642
| Number 642 reversed | 246 |
| Sum of the digits | 12 |
| Number of digits | 3 |
Arithmetic tables for 642
Other pages about 642
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