Q: Is 428,787 a Prime Number?
A: No, 428,787 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 428787 can be evenly divided by 1 3 9 27 15,881 47,643 142,929 and 428,787, with no remainder.
Since 428,787 cannot be divided by just 1 and 428,787, it is not a prime number.