Order 144.
57 conjugacy classes of subgroups.
| # | subgroup | G/H | class size | multiplicity | normal? | properties |
|---|---|---|---|---|---|---|
| 1 | Q8×C9 | C2 | 1 | 1 | yes | maximal, characteristic, complemented |
| 2 | C4×D9 | C2 | 1 | 3 | yes | maximal |
| 3 | Dic18 | C2 | 1 | 3 | yes | maximal, complemented |
| 4 | D3×Q8 | — | 3 | 1 | no | maximal |
| 5 | C2×D9 | C22 | 1 | 1 | yes | characteristic |
| 6 | C4×C9 | C22 | 1 | 3 | yes | — |
| 7 | Dic9 | C22 | 1 | 3 | yes | — |
| 8 | C3×Q8 | D3 | 1 | 1 | yes | characteristic |
| 9 | C4×D3 | — | 3 | 3 | no | — |
| 10 | Dic6 | — | 3 | 3 | no | — |
| 11 | C2×C9 | C23 | 1 | 1 | yes | characteristic |
| 12 | D9 | Q8 | 1 | 2 | yes | direct product factor |
| 13 | C2×Q8 | — | 9 | 1 | no | Sylow |
| 14 | C2×D3 | — | 3 | 1 | no | — |
| 15 | C3×C4 | C2×D3 | 1 | 3 | yes | — |
| 16 | Dic3 | — | 3 | 3 | no | — |
| 17 | C9 | C2×Q8 | 1 | 1 | yes | characteristic, complemented, Sylow |
| 18 | Q8 | — | 9 | 3 | no | — |
| 19 | Q8 | D9 | 1 | 1 | yes | characteristic, direct product factor |
| 20 | C2×C4 | — | 9 | 3 | no | — |
| 21 | C2×C3 | C22×D3 | 1 | 1 | yes | characteristic |
| 22 | D3 | — | 3 | 2 | no | — |
| 23 | C22 | — | 9 | 1 | no | — |
| 24 | C4 | — | 9 | 3 | no | — |
| 25 | C4 | C2×D9 | 1 | 3 | yes | — |
| 26 | C3 | D3×Q8 | 1 | 1 | yes | characteristic |
| 27 | C2 | — | 9 | 2 | no | — |
| 28 | C2 | C22×D9 | 1 | 1 | yes | characteristic |
| subgroup | G/H | |
|---|---|---|
| center | C2 | C22×D9 |
| commutator, cosocle | C2×C9 | C23 |
| Frattini, socle | C2×C3 | C22×D3 |
| Fitting | Q8×C9 | C2 |
| prime radical | C2×D9 | C22 |
| hypercenter | Q8 | D9 |
| hypocenter | C9 | C2×Q8 |
| LCS | G ▷ C2×C9 ▷ C9 | |
| UCS | C1 ◁ C2 ◁ Q8 | |
Splittings G = N ⋊ H with N normal; H ≅ G/N.
| N | H ≅ G/N | type |
|---|---|---|
| 1. Q8×C9 | C2 | semidirect |
| 3. Dic18 | C2 | semidirect |
| 12. D9 | Q8 | direct (N × H) |
| 17. C9 | C2×Q8 | semidirect |
| 19. Q8 | D9 | direct (N × H) |
By isomorphism type — maximal subgroups of the same type appear once, whether or not they are normal.
| subgroup | index |
|---|---|
| Q8×C9 | 2 |
| C4×D9 | 2 |
| Dic18 | 2 |
| D3×Q8 | 3 |