Q: Is 428,745 a Prime Number?
A: No, 428,745 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 428745 can be evenly divided by 1 3 5 15 101 283 303 505 849 1,415 1,515 4,245 28,583 85,749 142,915 and 428,745, with no remainder.
Since 428,745 cannot be divided by just 1 and 428,745, it is not a prime number.