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 $n$:
 * $\left({145, 146, 147, 148, 149}\right)$