Fatto matematico: 5187 is the only number n known for which f(n-1) = f(n) = f(n+1).
Trivia: 5187 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: March 14th is the day in 1942 that Orvan Hess and John Bumstead became the first in the world to successfully treat a patient, Anne Miller, using penicillin.