Q: Is 858,143 a Prime Number?
A: No, 858,143 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 858143 can be evenly divided by 1 11 13 17 143 187 221 353 2,431 3,883 4,589 6,001 50,479 66,011 78,013 and 858,143, with no remainder.
Since 858,143 cannot be divided by just 1 and 858,143, it is not a prime number.