Fatto generale: 126 is the number of years that Gilgamesh reigned according to the Sumerian king list.
Fatto matematico: 126 is a pentagonal pyramidal number, and a decagonal number as well as a pentatope number.
Trivia: 126 is the atomic number of unbihexium, an element that has not yet been discovered.
Data storica: May 5th is the day in 1215 that Rebel barons renounce their allegiance to King John of England — part of a chain of events leading to the signing of the Magna Carta.