No, 249 is not a prime number. It is a composite number: its digits add up to 15, which is divisible by 3, so 249 is divisible by 3.
249 has divisors other than 1 and itself. The smallest is 3: 249 ÷ 3 = 83.
Prime factorization: 249 = 3 × 83.
| Number | Prime? |
|---|---|
| 245 | No, 5 × 7 × 7 |
| 246 | No, 2 × 3 × 41 |
| 247 | No, 13 × 19 |
| 248 | No, 2 × 2 × 2 × 31 |
| 250 | No, 2 × 5 × 5 × 5 |
| 251 | Yes |
| 252 | No, 2 × 2 × 3 × 3 × 7 |
| 253 | No, 11 × 23 |
More about 249: 249 in binary.
Another number? Use the prime number checker for any value, or see the list of prime numbers.