Q: Is 685,000 a Prime Number?
A: No, 685,000 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 685000 can be evenly divided by 1 2 4 5 8 10 20 25 40 50 100 125 137 200 250 274 500 548 625 685 1,000 1,096 1,250 1,370 2,500 2,740 3,425 5,000 5,480 6,850 13,700 17,125 27,400 34,250 68,500 85,625 137,000 171,250 342,500 and 685,000, with no remainder.
Since 685,000 cannot be divided by just 1 and 685,000, it is not a prime number.