Q: Is 21,411 a Prime Number?
A: No, 21,411 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 21411 can be evenly divided by 1 3 9 13 27 39 61 117 183 351 549 793 1,647 2,379 7,137 and 21,411, with no remainder.
Since 21,411 cannot be divided by just 1 and 21,411, it is not a prime number.