D. R. Kaprekar

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Shri Dattathreya Ramachandra Kaprekar (1905–1986) was an Indian mathematician, whose name is associated with a number of concepts in number theory. He was born in Dahanu, near Bombay, in India.

He was interested in numbers, even as a small child.

He received his secondary school education in Thana and studied at Fergusson College in Poona. Kaprekar attended the University of Bombay, receiving his bachelor's degree in 1929. From 1930 until his retirement in 1962, he worked as a schoolteacher in Devlali, India. Kaprekar discovered many interesting properties in recreational number theory. He published extensively, writing about such topics as recurring decimals, magic squares, and integers with special properties.

Among his contributions are:

• Kaprekar numbers
• The Kaprekar constant
• Self numbers
• Harshad numbers

[edit] References

• Kenneth H. Rosen (2005). Elementary Number Theory and its Applications. Addison Wesley. 

[edit] External links

• http://www.4to40.com/legends/index.asp?article=legends_drkaprekar
• http://plus.maths.org/issue38/features/nishiyama/