Q: Is 128,397 a Prime Number?
A: No, 128,397 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 128397 can be evenly divided by 1 3 127 337 381 1,011 42,799 and 128,397, with no remainder.
Since 128,397 cannot be divided by just 1 and 128,397, it is not a prime number.