Q: Is 257,129 a Prime Number?
A: No, 257,129 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 257129 can be evenly divided by 1 389 661 and 257,129, with no remainder.
Since 257,129 cannot be divided by just 1 and 257,129, it is not a prime number.