Fatto matematico: 4781 is the number of (not necessarily distinct) sets of Egyptian fractions that sum to 1 with smallest fraction 1/20.
Trivia: 4781 is an uninteresting number.
Data storica: February 1st is the day in 2009 that Jóhanna Sigurðardóttir is chosen the first female Prime Minister of Iceland, becoming the first openly gay head of government in the modern world.