Q: Is 381,021 a Prime Number?
A: No, 381,021 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 381021 can be evenly divided by 1 3 17 31 51 93 241 527 723 1,581 4,097 7,471 12,291 22,413 127,007 and 381,021, with no remainder.
Since 381,021 cannot be divided by just 1 and 381,021, it is not a prime number.