Q: Is 21,158 a Prime Number?
A: No, 21,158 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 21158 can be evenly divided by 1 2 71 142 149 298 10,579 and 21,158, with no remainder.
Since 21,158 cannot be divided by just 1 and 21,158, it is not a prime number.