Q: Is 402,721 a Prime Number?
A: No, 402,721 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 402721 can be evenly divided by 1 11 31 341 1,181 12,991 36,611 and 402,721, with no remainder.
Since 402,721 cannot be divided by just 1 and 402,721, it is not a prime number.