Q: Is 815,000 a Prime Number?
A: No, 815,000 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 815000 can be evenly divided by 1 2 4 5 8 10 20 25 40 50 100 125 163 200 250 326 500 625 652 815 1,000 1,250 1,304 1,630 2,500 3,260 4,075 5,000 6,520 8,150 16,300 20,375 32,600 40,750 81,500 101,875 163,000 203,750 407,500 and 815,000, with no remainder.
Since 815,000 cannot be divided by just 1 and 815,000, it is not a prime number.