Fatto matematico: 4705 is the sum of consecutive squares in 2 ways.
Trivia: 4705 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: November 17th is the day in 1903 that the Russian Social Democratic Labor Party splits into two groups; the Bolsheviks (Russian for "majority") and Mensheviks (Russian for "minority").