8256

Number
$8256$ (eight thousand, two hundred and fifty-six) is:


 * $2^6 \times 3 \times 43$


 * The $128$th triangular number after $1$, $3$, $6$, $10$, $15$, $\ldots$, $7503$, $7626$, $7750$, $7875$, $8001$, $8128$:
 * $8256 = \displaystyle \sum_{k \mathop = 1}^{128} k = \dfrac {128 \times \paren {128 + 1} } 2$