Hecho general: 4149 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 4149 is a value of n for which s(n-1) = s(n+1).
Trivia: 4149 is an uninteresting number.
Fecha histórica: May 11th is the day in 1968 that the Toronto Transit Commission opens the largest expansion of its Bloor–Danforth line, going to Scarborough in the East, and Etobicoke in the West.