Q: Is 1,687,120 a Prime Number?
A: No, 1,687,120 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 1687120 can be evenly divided by 1 2 4 5 8 10 16 20 40 80 21,089 42,178 84,356 105,445 168,712 210,890 337,424 421,780 843,560 and 1,687,120, with no remainder.
Since 1,687,120 cannot be divided by just 1 and 1,687,120, it is not a prime number.