Q: Is 820,605 a Prime Number?
A: No, 820,605 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 820605 can be evenly divided by 1 3 5 15 227 241 681 723 1,135 1,205 3,405 3,615 54,707 164,121 273,535 and 820,605, with no remainder.
Since 820,605 cannot be divided by just 1 and 820,605, it is not a prime number.