Fatto generale: 42 is the number of US gallons in a barrel of oil.
Fatto matematico: 42 is the product of the first three terms of Sylvester's sequence; like the first five such numbers it is also a primary pseudoperfect number.
Trivia: 42 is the number of laws of cricket.
Data storica: February 11th is the day in 1959 that the Federation of Arab Emirates of the South, which will later become South Yemen, is created as a protectorate of the United Kingdom.