Q: Is 728,125 a Prime Number?
A: No, 728,125 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 728125 can be evenly divided by 1 5 25 125 233 625 1,165 3,125 5,825 29,125 145,625 and 728,125, with no remainder.
Since 728,125 cannot be divided by just 1 and 728,125, it is not a prime number.