Q: Is 1,087,780 a Prime Number?
A: No, 1,087,780 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 1087780 can be evenly divided by 1 2 4 5 10 20 137 274 397 548 685 794 1,370 1,588 1,985 2,740 3,970 7,940 54,389 108,778 217,556 271,945 543,890 and 1,087,780, with no remainder.
Since 1,087,780 cannot be divided by just 1 and 1,087,780, it is not a prime number.