Fatto matematico: 1137 is the maximum value of n so that there exist 7 denominations of stamps so that every postage from 1 to n can be paid for with at most 7 stamps.
Trivia: 1137 is an uninteresting number.
Data storica: February 10th is the day in 1962 that Captured American U2 spy-plane pilot Gary Powers is exchanged for captured Soviet spy Rudolf Abel.