Q: Is 128,840 a Prime Number?
A: No, 128,840 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 128840 can be evenly divided by 1 2 4 5 8 10 20 40 3,221 6,442 12,884 16,105 25,768 32,210 64,420 and 128,840, with no remainder.
Since 128,840 cannot be divided by just 1 and 128,840, it is not a prime number.