Fatto generale: 1105 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 1105 is the smallest number that can be written as the sum of 2 squares in 4 ways.
Trivia: 1105 is an uninteresting number.
Data storica: January 9th is the day in 1894 that New England Telephone and Telegraph installs the first battery-operated telephone switchboard in Lexington, Massachusetts.