Q: Is 125,721 a Prime Number?
A: No, 125,721 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 125721 can be evenly divided by 1 3 9 61 183 229 549 687 2,061 13,969 41,907 and 125,721, with no remainder.
Since 125,721 cannot be divided by just 1 and 125,721, it is not a prime number.