Q: Is 1,600,780 a Prime Number?
A: No, 1,600,780 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 1600780 can be evenly divided by 1 2 4 5 10 20 80,039 160,078 320,156 400,195 800,390 and 1,600,780, with no remainder.
Since 1,600,780 cannot be divided by just 1 and 1,600,780, it is not a prime number.