Q: Is 387,021 a Prime Number?
A: No, 387,021 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 387021 can be evenly divided by 1 3 23 69 71 79 213 237 1,633 1,817 4,899 5,451 5,609 16,827 129,007 and 387,021, with no remainder.
Since 387,021 cannot be divided by just 1 and 387,021, it is not a prime number.