Q: Is 6,720,321 a Prime Number?
A: No, 6,720,321 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 6720321 can be evenly divided by 1 3 17 51 131,771 395,313 2,240,107 and 6,720,321, with no remainder.
Since 6,720,321 cannot be divided by just 1 and 6,720,321, it is not a prime number.