Q: Is 258,458 a Prime Number?
A: No, 258,458 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 258458 can be evenly divided by 1 2 129,229 and 258,458, with no remainder.
Since 258,458 cannot be divided by just 1 and 258,458, it is not a prime number.