Q: Is 128,815 a Prime Number?
A: No, 128,815 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 128815 can be evenly divided by 1 5 25,763 and 128,815, with no remainder.
Since 128,815 cannot be divided by just 1 and 128,815, it is not a prime number.