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Happy 45²! 2025 = 45² is a “perfect square year.” It is represented by the square of the sum of all the digits in the decimal numbering system: (0 + 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9)² = 2025. It also represents the sum of the cubes of all the digits in the decimal numbering system: (0³ + 1³ + 2³ + 3³ + 4³ + 5³ + 6³ + 7³ + 8³ + 9³) = 2025. The last “perfect square year” occurred in 1936, and after 2025, the next will be in 2116. Happy 45² to all of us!!!