4869 can be read as "shi-ya-ro-ku" (しやろく); when "ya" is written small, this number can be read as "sharoku" (しゃろく), which resembles "Sherlock" (シャーロック, Shārokku), relating to Sherlock Holmes. This number is Conan Edogawa's phone PIN and named for APTX 4869 in Case Closed. TIL
4869 can be read as "shi-ya-ro-ku" (しやろく); when "ya" is written small, this number can be read as "sharoku" (しゃろく), which resembles "Sherlock" (シャーロック, Shārokku), relating to Sherlock Holmes. This number is Conan Edogawa's phone PIN and named for APTX 4869 in Case Closed.
TILJapanese wordplay - Wikipedia