The Economic Times: 'Ghost number' 6174: Meet Dattatreya Ramchandra Kaprekar, the Indian schoolteacher who discovered a myster
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D. R. Kaprekar
Dattatreya Ramchandra Kaprekar was an Indian recreational mathematician who described several classes of natural numbers including the Kaprekar, Harshad and self numbers and discovered Kaprekar's constant, named after him. Despite having no formal postgraduate training and working as a schoolteacher, he published extensively and became well known in recreational mathematics circles.
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science · Indian recreational mathematician (1905–1986) · mathematician · also D. R. Kaprekar, Dattatreya Ramchandra Kaprekar, Kaprekar
Born 17 January 1905 · Died 4 July 1986 · Q560998
13 published statements · 0 followers
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Published “Automated identification of left ventricular hypertrophy using cardiac ultrasound imaging: A systematic review of artificial intelligence driven approaches” in Informatics in Medicine Unlocked.
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2026· 4 entries
Published “Automated identification of left ventricular hypertrophy using cardiac ultrasound imaging: A systematic review of artificial intelligence driven approaches” in Informatics in Medicine Unlocked.
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Published “TrustNet: a lightweight network with integrated uncertainty quantification and quantitative explainable AI for ischemic stroke detection in CT images” in Scientific Reports — cited 2 times.
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Published “A multi-level attention CNN-transformer based framework for the detection of brain tumor using regional dual-score explainability” in Scientific Reports.
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2025· 1 entry
Published “The right S¹a + S² + S⁶a segmentectomy for deep interlobar lung cancer with fused fissure.” in ASVIDE.
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2024· 1 entry
Published “Thoracoscopic anatomical sublobar resection for deep interlobar lung cancer with fused fissure” in Journal of Thoracic Disease — cited 1 times.
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2023· 1 entry
Published “VIRTUAL REALITY MAKES MINDFULNESS ACCESSIBLE” in IIP Series.
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2016· 1 entry
Published “Survey: Automated Process of Revaluation” in International journal of Emerging Trends in Science and Technology.
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1986· 1 entry
Died 1986-07-04.
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1963· 1 entry
Kaprekar defined the property which has come to be known as self numbers, as the integers that cannot be generated by taking some other number and adding its own digits to it
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1955· 1 entry
Kaprekar discovered an interesting property of the number 6174, which was subsequently named the Kaprekar constant
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1929· 1 entry
Studied at Fergusson College (1923–1929).
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1905· 1 entry
Born 1905-01-17.
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