Apparently they're making a movie called '42'.
Knowing only this much about the movie, it's a useful way to segment people into a couple of groups based on the first association that comes to your mind from that number, either
a) Ah, that's Jackie Robinson's old number.
b) That movie must be about the answer to life, the universe and everything.
If I ranked people according to the chances that I'd find them interesting based on whether they thought of various combinations of a) and b), it would probably go:
1. b) only
2. Both a) and b)
3. Neither a) nor b)
4. a) only.
Your mileage may vary, but if you're reading this blog, I'm wager that it probably won't vary much.