Finite Group Databasebeta

D21×C139 #19154241

order5838
isoclinismisoclinic class of D21
automorphism?
homologyAbelianization (H1) = C2×C139 · Schur multiplier (H2) = C1

Aliases

direct productD21×C139
unambiguous semidirect productC3⋊(D7×C139)
unambiguous semidirect productC7⋊(D3×C139)

Splittings

Fitting, socle, HallC3×C7×C139 ⋊ C2
derived, HallC3×C7 ⋊ C2×C139
HallC7×C139 ⋊ D3
HallC3×C139 ⋊ D7
SylowC7 ⋊ D3×C139
SylowC3 ⋊ D7×C139

Subgroups

subgroupG/H
center, hypercenterC139D21
commutator, hypocenterC3×C7C2×C139
FrattiniC1G
Fitting, socleC3×C7×C139C2
LCSG ▷ C3×C7
UCSC1 ◁ C139

16 conjugacy classes of subgroups.

Full subgroup data →

Conjugacy classes & character table

1668 conjugacy classes. The character table is too large to display.

Relationships

maximal subgroup ofD21×D139, D3×D7×C139, D21⋊D139, …
maximal normal subgroup ofD21×D139, D3×D7×C139, D21⋊D139, …
maximal quotient ofDic21×C139, C2×D21×C139, D63×C139, …

GAP

Construct this group in GAP via the SmallGroups library:

gap> SmallGroup(5838, 11);