Q: Is 1,200,105 a Prime Number?
A: No, 1,200,105 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 1200105 can be evenly divided by 1 3 5 9 15 45 26,669 80,007 133,345 240,021 400,035 and 1,200,105, with no remainder.
Since 1,200,105 cannot be divided by just 1 and 1,200,105, it is not a prime number.