Q: Is 21,471 a Prime Number?
A: No, 21,471 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 21471 can be evenly divided by 1 3 17 51 421 1,263 7,157 and 21,471, with no remainder.
Since 21,471 cannot be divided by just 1 and 21,471, it is not a prime number.