Q: Is 428,140 a Prime Number?
A: No, 428,140 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 428140 can be evenly divided by 1 2 4 5 10 20 21,407 42,814 85,628 107,035 214,070 and 428,140, with no remainder.
Since 428,140 cannot be divided by just 1 and 428,140, it is not a prime number.