odd, composite · 123rd positive integer
The number 123
123 is an odd composite number. It is the 123rd positive integer.
Quick reference
| Prime factorization | 3 × 41 |
| Divisors | 1, 3, 41, 123 |
| Binary | 1111011 |
| Hexadecimal | 0x7B |
| Roman numeral | CXXIII |
| Digit sum | 6 |
| Properties | odd, composite |
Frequently asked
Is 123 a prime number?
No. 123 is composite. Its prime factorization is 3 × 41.
What are the factors of 123?
The factors (divisors) of 123 are 1, 3, 41, 123.
What is 123 in binary?
123 in binary is 1111011. In hexadecimal it's 7B.
What is 123 as a Roman numeral?
123 in Roman numerals is CXXIII.
What's the digit sum of 123?
Adding the digits of 123: 1 + 2 + 3 = 6.