odd, composite · 321st positive integer
The number 321
321 is an odd composite number. It is the 321st positive integer.
Quick reference
| Prime factorization | 3 × 107 |
| Divisors | 1, 3, 107, 321 |
| Binary | 101000001 |
| Hexadecimal | 0x141 |
| Roman numeral | CCCXXI |
| Digit sum | 6 |
| Properties | odd, composite |
Frequently asked
Is 321 a prime number?
No. 321 is composite. Its prime factorization is 3 × 107.
What are the factors of 321?
The factors (divisors) of 321 are 1, 3, 107, 321.
What is 321 in binary?
321 in binary is 101000001. In hexadecimal it's 141.
What is 321 as a Roman numeral?
321 in Roman numerals is CCCXXI.
What's the digit sum of 321?
Adding the digits of 321: 3 + 2 + 1 = 6.