Fatto matematico: 1039 is the number of different resistances that can be formed by nine or fewer 1-ohm resistors in series or parallel.
Trivia: 1039 is an uninteresting number.
Data storica: November 4th is the day in 1852 that Count Camillo Benso di Cavour becomes the prime minister of Piedmont-Sardinia, which soon expands to become Italy.