Q: Is 386,721 a Prime Number?
A: No, 386,721 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 386721 can be evenly divided by 1 3 9 27 14,323 42,969 128,907 and 386,721, with no remainder.
Since 386,721 cannot be divided by just 1 and 386,721, it is not a prime number.