Hecho general: 5861 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 5861 is an unremarkable number.
Trivia: 5861 is a boring number.
Fecha histórica: January 17th is the day in 1997 that a Delta 2 carrying a GPS2R satellite explodes 13 seconds after launch, dropping 250 tons of burning rocket remains around the launch pad.