Q: Is 2,145,143 a Prime Number?
A: No, 2,145,143 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 2145143 can be evenly divided by 1 7 11 13 77 91 143 1,001 2,143 15,001 23,573 27,859 165,011 195,013 306,449 and 2,145,143, with no remainder.
Since 2,145,143 cannot be divided by just 1 and 2,145,143, it is not a prime number.