Q: Is 857,873 a Prime Number?
A: Yes, 857,873 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 857873 can be evenly divided by 1 and 857,873, with no remainder.
Since 857,873 can be divided by just 1 and 857,873, it is a prime number.