Q: Is 402,439 a Prime Number?
A: No, 402,439 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 402439 can be evenly divided by 1 19 59 359 1,121 6,821 21,181 and 402,439, with no remainder.
Since 402,439 cannot be divided by just 1 and 402,439, it is not a prime number.