Q: Is 173,121 a Prime Number?
A: No, 173,121 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 173121 can be evenly divided by 1 3 13 23 39 69 193 299 579 897 2,509 4,439 7,527 13,317 57,707 and 173,121, with no remainder.
Since 173,121 cannot be divided by just 1 and 173,121, it is not a prime number.