142520452213 is a member of ONM who is best known for his contributions to FG&Q and in the GA&W requests thread. Usually referred to as 'Numberish Fellow', he is one of the friendliest members of ONM.
"He is superb at tech art, making avatars etc. Number Guy is one of or the most friendly members on ONM and a great pal" - Olly/Kazuya
"This dude rocks! He is an awesome member, and he made meh awesome avatar twice! He rocks!"- Killerkirby.
His nickname 'Numberish Fellow' was originally given to him by HNF1, presumably in the style of Lubba's names for characters in Super Mario Galaxy 2.