Q: Is 491,257 a Prime Number?
A: No, 491,257 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 491257 can be evenly divided by 1 13 23 31 53 299 403 689 713 1,219 1,643 9,269 15,847 21,359 37,789 and 491,257, with no remainder.
Since 491,257 cannot be divided by just 1 and 491,257, it is not a prime number.