Q: Is 2,645,721 a Prime Number?
A: No, 2,645,721 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 2645721 can be evenly divided by 1 3 9 13 39 117 22,613 67,839 203,517 293,969 881,907 and 2,645,721, with no remainder.
Since 2,645,721 cannot be divided by just 1 and 2,645,721, it is not a prime number.