Q: Is 428,261 a Prime Number?
A: No, 428,261 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 428261 can be evenly divided by 1 109 3,929 and 428,261, with no remainder.
Since 428,261 cannot be divided by just 1 and 428,261, it is not a prime number.