2025 = 45²
(3² x 5) squared.
(20 + 25) squared.
9² x 5² = 2025.
40² + 20² + 5²= 2025.
1³ + 2³ + 3³ + 4³ + 5³ + 6³ + 7³ + 8³ + 9³= 2025.
Sum of the first 45 odd numbers,
1 + 3 + 5 + ··· + 89 = 2025
(1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9)² = 2025
(2 + 0 + 2 + 5 = 9), which is a perfect square (3²).
My age, 72 = 2³ x 3², and the sum of the digits is 3²