Q: Is 21,065 a Prime Number?
A: No, 21,065 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 21065 can be evenly divided by 1 5 11 55 383 1,915 4,213 and 21,065, with no remainder.
Since 21,065 cannot be divided by just 1 and 21,065, it is not a prime number.