Q: Is 1,578,120 a Prime Number?
A: No, 1,578,120 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 1578120 can be evenly divided by 1 2 3 4 5 6 8 10 12 15 20 24 30 40 60 120 13,151 26,302 39,453 52,604 65,755 78,906 105,208 131,510 157,812 197,265 263,020 315,624 394,530 526,040 789,060 and 1,578,120, with no remainder.
Since 1,578,120 cannot be divided by just 1 and 1,578,120, it is not a prime number.