Hecho matemático: 2135 is a value of n for which s(n-1) + s(n+1) = s(2n).
Trivia: 2135 is an uninteresting number.
Fecha histórica: November 4th is the day in 1921 that the Sturmabteilung or SA, whose members were known as "brownshirts", physically assault Adolf Hitler's opposition after his speech in Munich.