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 unremarkable number.
Data storica: January 9th is the day in 2005 that Mahmoud Abbas wins the election to replace Yasser Arafat as President of the Palestinian National Authority.