Q: Is 128,505 a Prime Number?
A: No, 128,505 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 128505 can be evenly divided by 1 3 5 13 15 39 65 195 659 1,977 3,295 8,567 9,885 25,701 42,835 and 128,505, with no remainder.
Since 128,505 cannot be divided by just 1 and 128,505, it is not a prime number.