Fatto matematico: 5406 is the number of ways a 9×1 rectangle can be surrounded by 9×1 rectangles.
Trivia: 5406 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: October 19th is the day in 1864 that Battle of Cedar Creek – Union Army under Philip Sheridan destroys a Confederate Army under Jubal Early.