Q: Is 809,561 a Prime Number?
A: No, 809,561 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 809561 can be evenly divided by 1 43 67 281 2,881 12,083 18,827 and 809,561, with no remainder.
Since 809,561 cannot be divided by just 1 and 809,561, it is not a prime number.