63,504

Number
$63 \, 504$ (sixty-three thousand, five hundred and four) is:


 * $2^4 \times 3^4 \times 7^2$


 * The $252$nd square number:
 * $63 \, 504 = 252 \times 252$


 * The smallest integer which can be expressed as the product of an integer and its reversal in two different ways which is not a multiple of $10$:
 * $63 \, 504 = 252 \times 252 = 144 \times 441 = \left({2^2 \times 3^2 \times 7}\right) \times \left({2^2 \times 3^2 \times 7}\right) = \left({2^4 \times 3^2}\right) \times \left({3^2 \times 7^2}\right)$

Also see

 * Integers Expressible as Product of Number and Reversal in 2 Different Ways