Q: Is 721,672 a Prime Number?
A: No, 721,672 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 721672 can be evenly divided by 1 2 4 7 8 14 28 49 56 98 196 263 343 392 526 686 1,052 1,372 1,841 2,104 2,744 3,682 7,364 12,887 14,728 25,774 51,548 90,209 103,096 180,418 360,836 and 721,672, with no remainder.
Since 721,672 cannot be divided by just 1 and 721,672, it is not a prime number.