Q: Is 721,100 a Prime Number?
A: No, 721,100 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 721100 can be evenly divided by 1 2 4 5 10 20 25 50 100 7,211 14,422 28,844 36,055 72,110 144,220 180,275 360,550 and 721,100, with no remainder.
Since 721,100 cannot be divided by just 1 and 721,100, it is not a prime number.