It's 2 and it's very easy to solve. I solved it in just a few seconds.
Spoiler on how to solve:
Wheel 1 we will call A (for anticlockwise) the next wheel we will call C (for clockwise).
Every gear attached to another gear directly gets changed from whatever letter you were on to the next.
Every straight pulley there is no change, Every crossed pulley there is change in direction.
You should now be able to go through them all quickly and arrive at A for anticlockwise at the end which means the arrow will point to 2.