  We present stellar properties (mass, age, radius, distances) of 57 stars from
a seismic inference using full-length data sets from Kepler. These stars
comprise active stars, planet-hosts, solar-analogs, and binary systems. We
validate the distances derived from the astrometric Gaia-Tycho solution.
Ensemble analysis of the stellar properties reveals a trend of mixing-length
parameter with the surface gravity and effective temperature. We derive a
linear relationship with the seismic quantity $\langle r_{02} \rangle$ to
estimate the stellar age. Finally, we define the stellar regimes where the
Kjeldsen et al (2008) empirical surface correction for 1D model frequencies is
valid.
