Q: Is 128,357 a Prime Number?
A: No, 128,357 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 128357 can be evenly divided by 1 47 2,731 and 128,357, with no remainder.
Since 128,357 cannot be divided by just 1 and 128,357, it is not a prime number.