8256

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Number

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

$2^6 \times 3 \times 43$

The $128$th triangular number after $1$, $3$, $6$, $10$, $15$, $\ldots$, $7503$, $7626$, $7750$, $7875$, $8001$, $8128$:

$8256 = \ds \sum_{k \mathop = 1}^{128} k = \dfrac {128 \times \paren {128 + 1} } 2$

Also see

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