Q: Is 21,842 a Prime Number?
A: No, 21,842 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 21842 can be evenly divided by 1 2 67 134 163 326 10,921 and 21,842, with no remainder.
Since 21,842 cannot be divided by just 1 and 21,842, it is not a prime number.