Q: Is 721,649 a Prime Number?
A: No, 721,649 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 721649 can be evenly divided by 1 31 23,279 and 721,649, with no remainder.
Since 721,649 cannot be divided by just 1 and 721,649, it is not a prime number.