Q: Is 1,200,045 a Prime Number?
A: No, 1,200,045 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 1200045 can be evenly divided by 1 3 5 7 11 15 21 33 35 55 77 105 165 231 385 1,039 1,155 3,117 5,195 7,273 11,429 15,585 21,819 34,287 36,365 57,145 80,003 109,095 171,435 240,009 400,015 and 1,200,045, with no remainder.
Since 1,200,045 cannot be divided by just 1 and 1,200,045, it is not a prime number.