Q: Is 21,239 a Prime Number?
A: No, 21,239 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 21239 can be evenly divided by 1 67 317 and 21,239, with no remainder.
Since 21,239 cannot be divided by just 1 and 21,239, it is not a prime number.