Q: Is 128,487 a Prime Number?
A: No, 128,487 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 128487 can be evenly divided by 1 3 42,829 and 128,487, with no remainder.
Since 128,487 cannot be divided by just 1 and 128,487, it is not a prime number.