Q: Is 1,378,215 a Prime Number?
A: No, 1,378,215 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 1378215 can be evenly divided by 1 3 5 9 15 27 41 45 81 83 123 135 205 249 369 405 415 615 747 1,107 1,245 1,845 2,241 3,321 3,403 3,735 5,535 6,723 10,209 11,205 16,605 17,015 30,627 33,615 51,045 91,881 153,135 275,643 459,405 and 1,378,215, with no remainder.
Since 1,378,215 cannot be divided by just 1 and 1,378,215, it is not a prime number.