Q: Is 428,091 a Prime Number?
A: No, 428,091 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 428091 can be evenly divided by 1 3 142,697 and 428,091, with no remainder.
Since 428,091 cannot be divided by just 1 and 428,091, it is not a prime number.