“He could remember the idiosyncrasies of numbers in an almost uncanny way. It was Littlewood who said that every positive integer was one of Ramanujan's personal friends. I remember once going to see him when he was ill at Putney. I had ridden in taxi cab number 1729 and remarked that the number seemed to me rather a dull one, and that I hoped it was not an unfavorable omen. "No," he replied, "it is a very interesting number; it is the smallest number expressible as the sum of two cubes in two different ways."”

— G. H. Hardy

Source: Ramanujan (1940), Ch. I : The Indian mathematician Ramanujan.

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G. H. Hardy 20

British mathematician 1877–1947

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Roger Cooke in: The history of mathematics: a brief course http://books.google.co.in/books?id=z-ruAAAAMAAJ, Wiley, 7 October 1997, p. 207.

“It was Mr. Littlewood (I believe) who remarked that "every positive integer was one of his personal friends."”

John Edensor Littlewood (1885–1977) English Mathematician

(about Ramanujan) p. lvii of [Hardy, G. H., G. H. Hardy, Obituary Notices: Srinivasa Ramanujan, Proceedings of the London Mathematical Society, 19, xl-lviii, 1921, http://www.numbertheory.org/obituaries/LMS/ramanujan/index.html, 2008-05-26]