Q: Is 1,207,780 a Prime Number?
A: No, 1,207,780 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 1207780 can be evenly divided by 1 2 4 5 7 10 14 20 28 35 70 140 8,627 17,254 34,508 43,135 60,389 86,270 120,778 172,540 241,556 301,945 603,890 and 1,207,780, with no remainder.
Since 1,207,780 cannot be divided by just 1 and 1,207,780, it is not a prime number.