Q: Is 387,405 a Prime Number?
A: No, 387,405 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 387405 can be evenly divided by 1 3 5 9 15 45 8,609 25,827 43,045 77,481 129,135 and 387,405, with no remainder.
Since 387,405 cannot be divided by just 1 and 387,405, it is not a prime number.