Q: Is 420,780 a Prime Number?
A: No, 420,780 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 420780 can be evenly divided by 1 2 3 4 5 6 10 12 15 20 30 60 7,013 14,026 21,039 28,052 35,065 42,078 70,130 84,156 105,195 140,260 210,390 and 420,780, with no remainder.
Since 420,780 cannot be divided by just 1 and 420,780, it is not a prime number.