1306

Number
$1306$ (one thousand three hundred and six) is:
 * $2 \times 653$


 * The $16$th number after $0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 89, 135, 175, 518, 598$ which is the sum of the increasing powers of its digits taken in order:
 * $1^1 + 3^2 + 0^3 + 6^4 = 1306$


 * The $5$th number after $1, 9, 20, 180$ whose square has a $\sigma$ value which is itself square: