Order 504.
48 conjugacy classes of subgroups.
| subgroup | G/H | |
|---|---|---|
| center, hypercenter | C2 | D7×D9 |
| commutator, Fitting, cosocle | C2×C7×C9 | C22 |
| Frattini | C2×C3 | D3×D7 |
| socle | C2×C3×C7 | C2×D3 |
| hypocenter | C7×C9 | D4 |
| LCS | G ▷ C2×C7×C9 ▷ C7×C9 | |
| UCS | C1 ◁ C2 | |
Splittings G = N ⋊ H with N normal; H ≅ G/N.
| N | H ≅ G/N | type |
|---|---|---|
| 1. C2×D63 | C2 | semidirect |
| 2. C2×C9×D7 | C2 | semidirect |
| 3. C7×Dic9 | C2 | semidirect |
| 12. C7×C9 | D4 | semidirect |
| 19. Dic9 | D7 | semidirect |
| 21. C2×D7 | D9 | semidirect |
| 34. C9 | D28 | semidirect |
| 36. C7 | #611 | semidirect |
By isomorphism type — maximal subgroups of the same type appear once, whether or not they are normal.
| subgroup | index |
|---|---|
| C2×D63 | 2 |
| C2×C9×D7 | 2 |
| C7×Dic9 | 2 |
| #4246 | 3 |
| #611 | 7 |