Q: Is 721,275 a Prime Number?
A: No, 721,275 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 721275 can be evenly divided by 1 3 5 15 25 59 75 163 177 295 489 815 885 1,475 2,445 4,075 4,425 9,617 12,225 28,851 48,085 144,255 240,425 and 721,275, with no remainder.
Since 721,275 cannot be divided by just 1 and 721,275, it is not a prime number.