Q: Is 21,845 a Prime Number?
A: No, 21,845 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 21845 can be evenly divided by 1 5 17 85 257 1,285 4,369 and 21,845, with no remainder.
Since 21,845 cannot be divided by just 1 and 21,845, it is not a prime number.