Q: Is 21,264 a Prime Number?
A: No, 21,264 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 21264 can be evenly divided by 1 2 3 4 6 8 12 16 24 48 443 886 1,329 1,772 2,658 3,544 5,316 7,088 10,632 and 21,264, with no remainder.
Since 21,264 cannot be divided by just 1 and 21,264, it is not a prime number.