Tessarakontadyophobia

Tessarakontaduophobia (from Greek tessarakonta, "forty", and duo, "two") is the fear of number 42. Like the number 4, 42 is sometimes feared by the Asians since 42 in Japanese, shi ni (four two) is homophonic for "unto death" in Japanese. The number is denoted in the popular culture, especially in , where the planet-sized supercomputer, Deep Thought, took 7.5 million years to determine that the Answer to the Ultimate Question of Life, The Universe, and Everything is 42. Also in the episode of Lost, "The Numbers", 42 is the highest number in the six-number sequence, after 4, 8, 15, 16, and 23, which is used as coefficients to predict human demise. In real life, 42 was retired by all of Major League Baseball in honor of Jackie Robinson, which may give them fear that the number may be banned from everything.

People who fear number 42 may believe that the number is connected with everything and that the number is the sign of that the mankind will end. Some may even believe that mankind will go extinct when the sufferer turns 42.