Fatto matematico: 4252 is the smallest number in base 8 to have 5 different digits.
Trivia: 4252 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: August 22nd is the day in 1639 that Madras (now Chennai), India, is founded by the British East India Company on a sliver of land bought from local Nayak rulers.