Q: Is 2,506,780 a Prime Number?
A: No, 2,506,780 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 2506780 can be evenly divided by 1 2 4 5 10 20 125,339 250,678 501,356 626,695 1,253,390 and 2,506,780, with no remainder.
Since 2,506,780 cannot be divided by just 1 and 2,506,780, it is not a prime number.