Q: Is 21,489 a Prime Number?
A: No, 21,489 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 21489 can be evenly divided by 1 3 13 19 29 39 57 87 247 377 551 741 1,131 1,653 7,163 and 21,489, with no remainder.
Since 21,489 cannot be divided by just 1 and 21,489, it is not a prime number.