even, composite · 642nd positive integer
The number 642
642 is an even composite number. It is the 642nd positive integer.
Quick reference
| Prime factorization | 2 × 3 × 107 |
| Divisors | 1, 2, 3, 6, 107, 214, 321, 642 |
| Binary | 1010000010 |
| Hexadecimal | 0x282 |
| Roman numeral | DCXLII |
| Digit sum | 12 |
| Properties | even, composite |
Frequently asked
Is 642 a prime number?
No. 642 is composite. Its prime factorization is 2 × 3 × 107.
What are the factors of 642?
The factors (divisors) of 642 are 1, 2, 3, 6, 107, 214, 321, 642.
What is 642 in binary?
642 in binary is 1010000010. In hexadecimal it's 282.
What is 642 as a Roman numeral?
642 in Roman numerals is DCXLII.
What's the digit sum of 642?
Adding the digits of 642: 6 + 4 + 2 = 12.