
In Formula 1 all drivers use a fixed race number. The championship introduced this concept in 2014 to increase the recognition of the drivers on the track for the fans. In previous years, the starting numbers were handed out based on the final ranking of the constructors' championship from the prior season.
Now only the reigning world champion can choose to change his number for the season: he may replace it with the #1. All other drivers must stick to their chosen number.