Q: Is 4,280,321 a Prime Number?
A: No, 4,280,321 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 4280321 can be evenly divided by 1 107 109 367 11,663 39,269 40,003 and 4,280,321, with no remainder.
Since 4,280,321 cannot be divided by just 1 and 4,280,321, it is not a prime number.