Hecho matemático: 1257 is a value of n for which f(s(n)) = f(n).
Trivia: 1257 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fecha histórica: June 10th is the day in 2002 that the first direct electronic communication experiment between the nervous systems of two humans is carried out by Kevin Warwick in the United Kingdom.