Q: Is 491,721 a Prime Number?
A: No, 491,721 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 491721 can be evenly divided by 1 3 61 183 2,687 8,061 163,907 and 491,721, with no remainder.
Since 491,721 cannot be divided by just 1 and 491,721, it is not a prime number.