odd, composite · 345th positive integer
The number 345
345 is an odd composite number. It is the 345th positive integer.
Quick reference
| Prime factorization | 3 × 5 × 23 |
| Divisors | 1, 3, 5, 15, 23, 69, 115, 345 |
| Binary | 101011001 |
| Hexadecimal | 0x159 |
| Roman numeral | CCCXLV |
| Digit sum | 12 |
| Properties | odd, composite |
Frequently asked
Is 345 a prime number?
No. 345 is composite. Its prime factorization is 3 × 5 × 23.
What are the factors of 345?
The factors (divisors) of 345 are 1, 3, 5, 15, 23, 69, 115, 345.
What is 345 in binary?
345 in binary is 101011001. In hexadecimal it's 159.
What is 345 as a Roman numeral?
345 in Roman numerals is CCCXLV.
What's the digit sum of 345?
Adding the digits of 345: 3 + 4 + 5 = 12.