Fatto matematico: 15929 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 15929 is an unremarkable number.
Data storica: August 11th is the day in 1961 that the former Portuguese territories in India of Dadra and Nagar Haveli are merged to create the Union Territory Dadra and Nagar Haveli.