Q: Is 428,445 a Prime Number?
A: No, 428,445 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 428445 can be evenly divided by 1 3 5 9 15 45 9,521 28,563 47,605 85,689 142,815 and 428,445, with no remainder.
Since 428,445 cannot be divided by just 1 and 428,445, it is not a prime number.