Q: Is 2,117,721 a Prime Number?
A: No, 2,117,721 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 2117721 can be evenly divided by 1 3 19 53 57 159 701 1,007 2,103 3,021 13,319 37,153 39,957 111,459 705,907 and 2,117,721, with no remainder.
Since 2,117,721 cannot be divided by just 1 and 2,117,721, it is not a prime number.