odd, composite · 145th positive integer
The number 145
145 is an odd composite number. It is the 145th positive integer.
Quick reference
| Prime factorization | 5 × 29 |
| Divisors | 1, 5, 29, 145 |
| Binary | 10010001 |
| Hexadecimal | 0x91 |
| Roman numeral | CXLV |
| Digit sum | 10 |
| Properties | odd, composite |
Frequently asked
Is 145 a prime number?
No. 145 is composite. Its prime factorization is 5 × 29.
What are the factors of 145?
The factors (divisors) of 145 are 1, 5, 29, 145.
What is 145 in binary?
145 in binary is 10010001. In hexadecimal it's 91.
What is 145 as a Roman numeral?
145 in Roman numerals is CXLV.
What's the digit sum of 145?
Adding the digits of 145: 1 + 4 + 5 = 10.