9045

Number
$9045$ (nine thousand and forty-five) is:


 * $3^3 \times 5 \times 67$


 * The $134$th triangular number after $1$, $3$, $6$, $10$, $15$, $\ldots$, $7503$, $7626$, $7750$, $7875$, $8001$, $8128$, $8256$, $8385$, $8515$, $8646$, $8778$, $8911$:
 * $9045 = \ds \sum_{k \mathop = 1}^{134} k = \dfrac {134 \times \paren {134 + 1} } 2$