612

Number
$612$ (six hundred and twelve) is:
 * $2^2 \times 3^2 \times 17$


 * The $30$th Zuckerman number after $1$, $2$, $3$, $4$, $5$, $6$, $7$, $8$, $9$, $11$, $12$, $\ldots$, $216$, $224$, $312$, $315$, $384$, $432$:
 * $612 = 51 \times 12 = 51 \times \left({6 \times 1 \times 2}\right)$


 * The $49$th untouchable number after $2$, $5$, $52$, $88$, $96$, $120$, $124$, $\ldots$, $530$, $540$, $552$, $556$, $562$, $576$, $584$