A million seconds is over 11 days straight without stopping for sleep, food, or anything! I very much doubt that they actually did it.
If you count one a second, you're counting very slowly. Also, you can take breaks and pick it back up, making a note where you left off. I did it this way once, growing up.
If you count one a second, you're counting very slowly.
That stops being true long before you reach the finish line. Try timing yourself counting from 147,895 to 147,900 and see how long it takes.