Q: Is 399,742 a Prime Number?
A: No, 399,742 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 399742 can be evenly divided by 1 2 7 14 49 98 4,079 8,158 28,553 57,106 199,871 and 399,742, with no remainder.
Since 399,742 cannot be divided by just 1 and 399,742, it is not a prime number.