General fact: 401 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 401 is the number of connected planar Eulerian graphs with 9 vertices.
Trivia: 401 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Historical date: February 4th is the day in 1820 that the Chilean Navy under the command of Lord Cochrane completes the 2 day long Capture of Valdivia with just 300 men and 2 ships.