Q: Is 21,249 a Prime Number?
A: No, 21,249 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 21249 can be evenly divided by 1 3 9 27 787 2,361 7,083 and 21,249, with no remainder.
Since 21,249 cannot be divided by just 1 and 21,249, it is not a prime number.