Q: Is 851,020 a Prime Number?
A: No, 851,020 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 851020 can be evenly divided by 1 2 4 5 10 17 20 34 68 85 170 340 2,503 5,006 10,012 12,515 25,030 42,551 50,060 85,102 170,204 212,755 425,510 and 851,020, with no remainder.
Since 851,020 cannot be divided by just 1 and 851,020, it is not a prime number.