4995
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Number
$4995$ (four thousand, nine hundred and ninety-five) is:
- $3^3 \times 5 \times 37$
- The $45$th heptagonal number after $1$, $7$, $18$, $34$, $55$, $81$, $112$, $\ldots$, $3010$, $3186$, $3367$, $3744$, $3940$, $4141$, $4347$, $4558$, $4774$:
- $4995 = \ds \sum_{k \mathop = 1}^{45} \paren {5 k - 4} = \dfrac {45 \paren {5 \times 45 - 3} } 2$