Q: Is 2,167,721 a Prime Number?
A: No, 2,167,721 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 2167721 can be evenly divided by 1 17 29 493 4,397 74,749 127,513 and 2,167,721, with no remainder.
Since 2,167,721 cannot be divided by just 1 and 2,167,721, it is not a prime number.