1311

Number
$1311$ (one thousand, three hundred and eleven) is:


 * $3 \times 19 \times 23$


 * The $3$rd term of the $1$st triplet of consecutive positive integers all of which are sphenic:
 * $1309 = 7 \times 11 \times 17$, $1310 = 2 \times 5 \times 131$, $1311 = 3 \times 19 \times 23$


 * The $46$th Zuckerman number after $1$, $2$, $3$, $4$, $5$, $6$, $7$, $8$, $9$, $11$, $12$, $\ldots$, $1111$, $1112$, $1113$, $1115$, $1116$, $1131$, $1176$, $1184$, $1197$, $1212$, $1296$:
 * $1311 = 437 \times 3 = 437 \times \paren {1 \times 3 \times 1 \times 1}$