Q: Is 123,128 a Prime Number?
A: No, 123,128 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 123128 can be evenly divided by 1 2 4 8 15,391 30,782 61,564 and 123,128, with no remainder.
Since 123,128 cannot be divided by just 1 and 123,128, it is not a prime number.