Numbers whose Product with Reverse are Equal/Historical Note
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Theorem
According to David Wells in his Curious and Interesting Numbers of $1986$, this result appeared in a $1939$ issue of Scripta Mathematica, attributed to A.A.K. Iyangar.
However, it has not been possible to corroborate this.
Sources
- 1986: David Wells: Curious and Interesting Numbers ... (previous) ... (next): $651$
- 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $651$