Q: Is 128,215 a Prime Number?
A: No, 128,215 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 128215 can be evenly divided by 1 5 25,643 and 128,215, with no remainder.
Since 128,215 cannot be divided by just 1 and 128,215, it is not a prime number.