Fait général: 42005 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 42005 is a boring number.
Culture générale: 42005 is an unremarkable number.
Date historique: January 2nd is the day in 1959 that Luna 1, the first spacecraft to reach the vicinity of the Moon and to orbit the Sun, is launched by the Soviet Union.