1209

Number
$1209$ (one thousand, two hundred and nine) is:
 * $3 \times 13 \times 31$


 * The $6$th positive integer after $504$, $756$, $806$, $1008$, $1148$ which can be expressed as the product of $2$ two-digit numbers in $2$ ways such that the factors in one of those pairs is the reversal of each of the factors in the other:
 * $1209 = 13 \times 93 = 39 \times 31$