Q: Is 1,616,721 a Prime Number?
A: No, 1,616,721 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 1616721 can be evenly divided by 1 3 29 87 18,583 55,749 538,907 and 1,616,721, with no remainder.
Since 1,616,721 cannot be divided by just 1 and 1,616,721, it is not a prime number.