Q: Is 21,237 a Prime Number?
A: No, 21,237 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 21237 can be evenly divided by 1 3 7,079 and 21,237, with no remainder.
Since 21,237 cannot be divided by just 1 and 21,237, it is not a prime number.