Q: Is 2,678,420 a Prime Number?
A: No, 2,678,420 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 2678420 can be evenly divided by 1 2 4 5 10 20 157 314 628 785 853 1,570 1,706 3,140 3,412 4,265 8,530 17,060 133,921 267,842 535,684 669,605 1,339,210 and 2,678,420, with no remainder.
Since 2,678,420 cannot be divided by just 1 and 2,678,420, it is not a prime number.