Q: Is 1,125,643 a Prime Number?
A: No, 1,125,643 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 1125643 can be evenly divided by 1 23 109 449 2,507 10,327 48,941 and 1,125,643, with no remainder.
Since 1,125,643 cannot be divided by just 1 and 1,125,643, it is not a prime number.