Fatto matematico: 2135 is a value of n for which s(n-1) + s(n+1) = s(2n).
Trivia: 2135 is a boring number.
Data storica: November 4th is the day in 1970 that Genie, a 13-year-old feral child is found in Los Angeles, California having been locked in her bedroom for most of her life.