Q: Is 421,173 a Prime Number?
A: No, 421,173 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 421173 can be evenly divided by 1 3 9 19 27 57 171 513 821 2,463 7,389 15,599 22,167 46,797 140,391 and 421,173, with no remainder.
Since 421,173 cannot be divided by just 1 and 421,173, it is not a prime number.