No, 365 is not a prime number. It is a composite number: it ends in 5, so it is divisible by 5.
365 has divisors other than 1 and itself. The smallest is 5: 365 ÷ 5 = 73.
Prime factorization: 365 = 5 × 73.
| Number | Prime? |
|---|---|
| 361 | No, 19 × 19 |
| 362 | No, 2 × 181 |
| 363 | No, 3 × 11 × 11 |
| 364 | No, 2 × 2 × 7 × 13 |
| 366 | No, 2 × 3 × 61 |
| 367 | Yes |
| 368 | No, 2 × 2 × 2 × 2 × 23 |
| 369 | No, 3 × 3 × 41 |
More about 365: 365 in binary.
Another number? Use the prime number checker for any value, or see the list of prime numbers.