Fatto matematico: 2671 is a value of n for which 2n and 7n together use the digits 1-9 exactly once.
Trivia: 2671 is an uninteresting number.
Data storica: April 24th is the day in 1918 that First tank-to-tank combat, at Villers-Bretonneux, France, when three British Mark IVs met three German A7Vs.