Q: Is 387,123 a Prime Number?
A: No, 387,123 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 387123 can be evenly divided by 1 3 11 33 11,731 35,193 129,041 and 387,123, with no remainder.
Since 387,123 cannot be divided by just 1 and 387,123, it is not a prime number.