140

Number
$140$ (one hundred and forty) is:


 * $2^2 \times 5 \times 7$


 * The $7$th square pyramidal number after $1, 5, 14, 30, 55, 91$:
 * $140 = 1 + 4 + 9 + 16 + 25 + 36 + 49$


 * With $195$, an element of the $2$nd quasiamicable pair:
 * $\sigma \left({140}\right) = \sigma \left({195}\right) = 336 = 140 + 195 + 1$