Fatto matematico: 15429 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 15429 is an unremarkable number.
Data storica: March 29th is the day in 1999 that the Dow Jones Industrial Average closes above the 10,000 mark (10,006.78) for the first time, during the height of the internet boom.