Q: Is 1,000,665 a Prime Number?
A: No, 1,000,665 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 1000665 can be evenly divided by 1 3 5 9 15 37 45 111 185 333 555 601 1,665 1,803 3,005 5,409 9,015 22,237 27,045 66,711 111,185 200,133 333,555 and 1,000,665, with no remainder.
Since 1,000,665 cannot be divided by just 1 and 1,000,665, it is not a prime number.