Q: Is 428,500 a Prime Number?
A: No, 428,500 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 428500 can be evenly divided by 1 2 4 5 10 20 25 50 100 125 250 500 857 1,714 3,428 4,285 8,570 17,140 21,425 42,850 85,700 107,125 214,250 and 428,500, with no remainder.
Since 428,500 cannot be divided by just 1 and 428,500, it is not a prime number.