Q: Is 402,409 a Prime Number?
A: No, 402,409 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 402409 can be evenly divided by 1 7 57,487 and 402,409, with no remainder.
Since 402,409 cannot be divided by just 1 and 402,409, it is not a prime number.