Q: Is 400,002 a Prime Number?
A: No, 400,002 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 400002 can be evenly divided by 1 2 3 6 163 326 409 489 818 978 1,227 2,454 66,667 133,334 200,001 and 400,002, with no remainder.
Since 400,002 cannot be divided by just 1 and 400,002, it is not a prime number.