Q: Is 821,861 a Prime Number?
A: Yes, 821,861 is a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 821861 can be evenly divided by 1 and 821,861, with no remainder.
Since 821,861 can be divided by just 1 and 821,861, it is a prime number.