Q: Is 857,223 a Prime Number?
A: No, 857,223 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 857223 can be evenly divided by 1 3 9 19 27 57 81 171 513 557 1,539 1,671 5,013 10,583 15,039 31,749 45,117 95,247 285,741 and 857,223, with no remainder.
Since 857,223 cannot be divided by just 1 and 857,223, it is not a prime number.