Q: Is 721,361 a Prime Number?
A: No, 721,361 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 721361 can be evenly divided by 1 17 42,433 and 721,361, with no remainder.
Since 721,361 cannot be divided by just 1 and 721,361, it is not a prime number.