Q: Is 21,459 a Prime Number?
A: No, 21,459 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 21459 can be evenly divided by 1 3 23 69 311 933 7,153 and 21,459, with no remainder.
Since 21,459 cannot be divided by just 1 and 21,459, it is not a prime number.