Finite Group DatabasebetaFinite Group Databasebeta| order | 18945 |
| automorphism | ? |
| homology | Abelianization (H1) = C5×C9 · Schur multiplier (H2) = C1 |
| unambiguous semidirect product | (C421⋊C5)⋊C9 |
| unambiguous semidirect product | (C421⋊C9)⋊C5 |
| derived, Sylow | C421 ⋊ C5×C9 |
| Hall | C421⋊C9 ⋊ C5 |
| Hall | C421⋊C5 ⋊ C9 |
| subgroup | G/H | |
|---|---|---|
| center, Frattini, hypercenter | C3 | (C421⋊C3)⋊C5 |
| commutator, hypocenter | C421 | C5×C9 |
| Fitting, socle, cosocle | C3×C421 | C3×C5 |
| prime radical | C3×C421⋊C5 | C3 |
| LCS | G ▷ C421 | |
| UCS | C1 ◁ C3 | |
12 conjugacy classes of subgroups.
| transitive degree | μt(G) = 3789 |
Polycyclic presentation:
3,5,421,3|a^3=d,c^a=c^400,c^b=c^279129 conjugacy classes — view the full character table.
| maximal subgroup of | C2×(C421⋊C5)⋊C9, (D421⋊C5)⋊C9 |
| maximal normal subgroup of | C2×(C421⋊C5)⋊C9, (D421⋊C5)⋊C9 |
| maximal quotient of | C2×(C421⋊C5)⋊C9 |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(18945, 2);