Q: Is 21,641 a Prime Number?
A: No, 21,641 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 21641 can be evenly divided by 1 17 19 67 323 1,139 1,273 and 21,641, with no remainder.
Since 21,641 cannot be divided by just 1 and 21,641, it is not a prime number.