No, 245 is not a prime number. It is a composite number: it ends in 5, so it is divisible by 5.
245 has divisors other than 1 and itself. The smallest is 5: 245 ÷ 5 = 49.
Prime factorization: 245 = 5 × 7 × 7 = 5 × 7².
| Number | Prime? |
|---|---|
| 241 | Yes |
| 242 | No, 2 × 11 × 11 |
| 243 | No, 3 × 3 × 3 × 3 × 3 |
| 244 | No, 2 × 2 × 61 |
| 246 | No, 2 × 3 × 41 |
| 247 | No, 13 × 19 |
| 248 | No, 2 × 2 × 2 × 31 |
| 249 | No, 3 × 83 |
More about 245: 245 in binary.
Another number? Use the prime number checker for any value, or see the list of prime numbers.