175

Number
$175$ (one hundred and seventy-five) is:
 * $5^2 \times 7$


 * The $13$th number after $0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 89, 135$ which is the sum of the increasing powers of its digits taken in order:
 * $1^1 + 7^2 + 5^3 = 175$


 * The magic constant of the order $7$ magic square:
 * $175 = \dfrac {7 \left({7^2 + 1}\right)} 2$