Q: Is 721,375 a Prime Number?
A: No, 721,375 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 721375 can be evenly divided by 1 5 25 29 125 145 199 725 995 3,625 4,975 5,771 24,875 28,855 144,275 and 721,375, with no remainder.
Since 721,375 cannot be divided by just 1 and 721,375, it is not a prime number.