Fatto generale: 8145 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 8145 is an uninteresting number.
Trivia: 8145 is an unremarkable number.
Data storica: April 19th is the day in 65 that the freedman Milichus betrayed Piso’s plot to kill the Emperor Nero and all the conspirators were arrested.