Fatto generale: 174 is the length in miles of the The Columbia University Library System collection, with over 9.3 million volumes, if stretched end-to-end.
Fatto matematico: 174 is a square-free number.
Trivia: 174 is the atomic number of an element temporarily called Unseptquadium.
Data storica: June 22nd is the day in 1942 that Erwin Rommel is promoted to Field Marshal after the capture of Tobruk.