Q: Is 285,508 a Prime Number?
A: No, 285,508 is not a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 285508 can be evenly divided by 1 2 4 137 274 521 548 1,042 2,084 71,377 142,754 and 285,508, with no remainder.
Since 285,508 cannot be divided by just 1 and 285,508, it is not a prime number.