Hecho general: 9452 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 9452 is the smallest number whose cube contains 5 consecutive 4's.
Trivia: 9452 is an unremarkable number.
Fecha histórica: November 16th is the day in 1979 that the first line of Bucharest Metro (Line M1) is opened from Timpuri Noi to Semănătoarea in Bucharest, Romania.