852

Number
$852$ (eight hundred and fifty-two) is:


 * $2^2 \times 3 \times 71$


 * The $24$th pentagonal number after $1$, $5$, $12$, $22$, $35$, $\ldots$, $477$, $532$, $590$, $651$, $715$, $782$:
 * $852 = \displaystyle \sum_{k \mathop = 1}^{24} \left({3 k - 2}\right) = \dfrac {24 \left({3 \times 24 - 1}\right)} 2$