Q: Is 1,239,780 a Prime Number?
A: No, 1,239,780 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 1239780 can be evenly divided by 1 2 3 4 5 6 10 12 15 20 30 60 20,663 41,326 61,989 82,652 103,315 123,978 206,630 247,956 309,945 413,260 619,890 and 1,239,780, with no remainder.
Since 1,239,780 cannot be divided by just 1 and 1,239,780, it is not a prime number.