1276

Number
$1276$ (one thousand, two hundred and seventy-six) is:
 * $2^2 \times 11 \times 29$


 * The $29$th second pentagonal number after $2$, $7$, $15$, $26$, $\ldots$, $610$, $672$, $737$, $805$, $876$, $950$, $1027$, $1107$, $1190$:
 * $1276 = \dfrac {28 \left({3 \times 29 + 1}\right)} 2$