Q: Is 820,556 a Prime Number?
A: No, 820,556 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 820556 can be evenly divided by 1 2 4 11 17 22 34 44 68 187 374 748 1,097 2,194 4,388 12,067 18,649 24,134 37,298 48,268 74,596 205,139 410,278 and 820,556, with no remainder.
Since 820,556 cannot be divided by just 1 and 820,556, it is not a prime number.