Q: Is 3,120,780 a Prime Number?
A: No, 3,120,780 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 3120780 can be evenly divided by 1 2 3 4 5 6 10 12 13 15 20 26 30 39 52 60 65 78 130 156 195 260 390 780 4,001 8,002 12,003 16,004 20,005 24,006 40,010 48,012 52,013 60,015 80,020 104,026 120,030 156,039 208,052 240,060 260,065 312,078 520,130 624,156 780,195 1,040,260 1,560,390 and 3,120,780, with no remainder.
Since 3,120,780 cannot be divided by just 1 and 3,120,780, it is not a prime number.