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