automorphic number
Quick Summary
An automorphic number is an integer whose square ends with the integer itself. For example, 25 is an automorphic number because its square, 625, ends in 25. Similarly, 76 is an automorphic number because its square, 5776, ends in 76. These numbers are a type of number curiosity, where mathematical operations reveal interesting patterns. The term "automorphic" itself can also refer to something patterned after itself.12
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