Nokia n1?)
Nokia's devices always used to have some strange serial numbers So people in stores always ask for "Nokia ####" or "n##"
So n1 will somehow arrange the device in product grid. Hi-def camera,awesome possibilities to share photos and watch vids/listen music. So it's "n-series" for sure. Much more "n" than n810 right now.
And "n1" because it will be the most advanced n-series device on the market (or not?), so it's like "number one". And it's just easy to remember.