Q: Is 39,721 a Prime Number?
A: No, 39,721 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 39721 can be evenly divided by 1 11 23 157 253 1,727 3,611 and 39,721, with no remainder.
Since 39,721 cannot be divided by just 1 and 39,721, it is not a prime number.