Q: Is 2,161,321 a Prime Number?
A: No, 2,161,321 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 2161321 can be evenly divided by 1 181 11,941 and 2,161,321, with no remainder.
Since 2,161,321 cannot be divided by just 1 and 2,161,321, it is not a prime number.