146

Number
$146$ (one hundred and forty-six) is:


 * $2 \times 73$


 * The $19$th nontotient after $14$, $26$, $34$, $38$, $50$, $62$, $68$, $74$, $76$, $86$, $90$, $94$, $98$, $114$, $118$, $122$, $124$, $134$, $142$:
 * $\nexists m \in \Z_{>0}: \phi \left({m}\right) = 146$
 * where $\phi \left({m}\right)$ denotes the Euler $\phi$ function


 * The $13$th noncototient after $10$, $26$, $34$, $50$, $52$, $58$, $86$, $100$, $116$, $122$, $130$, $134$:
 * $\nexists m \in \Z_{>0}: m - \phi \left({m}\right) = 146$
 * where $\phi \left({m}\right)$ denotes the Euler $\phi$ function


 * The $8$th untouchable number after $2, 5, 52, 88, 96, 120, 124$.


 * The $2$nd term of the $3$rd $5$-tuple of consecutive integers have the property that they are not values of the $\sigma$ function $\sigma \left({n}\right)$ for any $n$:
 * $\left({145, 146, 147, 148, 149}\right)$


 * The $7$th of the $17$ positive integers for which the value of the Euler $\phi$ function is $72$:
 * $73, 91, 95, 111, 117, 135, 146, 148, 152, 182, 190, 216, 222, 228, 234, 252, 270$