Q: Is 256,478 a Prime Number?
A: No, 256,478 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 256478 can be evenly divided by 1 2 128,239 and 256,478, with no remainder.
Since 256,478 cannot be divided by just 1 and 256,478, it is not a prime number.