Q: Is 687,520 a Prime Number?
A: No, 687,520 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 687520 can be evenly divided by 1 2 4 5 8 10 16 20 32 40 80 160 4,297 8,594 17,188 21,485 34,376 42,970 68,752 85,940 137,504 171,880 343,760 and 687,520, with no remainder.
Since 687,520 cannot be divided by just 1 and 687,520, it is not a prime number.