Finite Group DatabasebetaFinite Group DatabasebetaOrder 405.
66 conjugacy classes of subgroups.
| # | subgroup | G/H | class size | multiplicity | normal? | properties |
|---|---|---|---|---|---|---|
| 1 | C5×3−1+2 | C3 | 1 | 8 | yes | maximal, complemented |
| 2 | C5×H(3,𝔽3) | C3 | 1 | 1 | yes | maximal, characteristic |
| 3 | C3×C5×C9 | C3 | 1 | 4 | yes | maximal, complemented |
| 4 | #737 | C5 | 1 | 1 | yes | maximal, characteristic, direct product factor, Sylow |
| 5 | C32×C5 | C32 | 1 | 4 | yes | — |
| 6 | C5×C9 | C32 | 1 | 8 | yes | — |
| 7 | C5×C9 | C32 | 1 | 1 | yes | characteristic |
| 8 | 3−1+2 | C3×C5 | 1 | 8 | yes | complemented |
| 9 | H(3,𝔽3) | C3×C5 | 1 | 1 | yes | characteristic |
| 10 | C3×C9 | C3×C5 | 1 | 4 | yes | complemented |
| 11 | C3×C5 | — | 3 | 4 | no | — |
| 12 | C3×C5 | C33 | 1 | 1 | yes | characteristic |
| 13 | C32 | C32×C5 | 1 | 4 | yes | — |
| 14 | C9 | C32×C5 | 1 | 1 | yes | characteristic |
| 15 | C9 | C32×C5 | 1 | 8 | yes | — |
| 16 | C5 | #737 | 1 | 1 | yes | characteristic, direct product factor, Sylow |
| 17 | C3 | — | 3 | 4 | no | — |
| 18 | C3 | C33×C5 | 1 | 1 | yes | characteristic |
| subgroup | G/H | |
|---|---|---|
| center | C5×C9 | C32 |
| commutator, Frattini, cosocle | C3 | C33×C5 |
| socle | C3×C5 | C33 |
| prime radical | C5×H(3,𝔽3) | C3 |
| LCS | G ▷ C3 ▷ C1 | |
| UCS | C1 ◁ C5×C9 ◁ G | |
Splittings G = N ⋊ H with N normal; H ≅ G/N.
| N | H ≅ G/N | type |
|---|---|---|
| 1. C5×3−1+2 | C3 | semidirect |
| 3. C3×C5×C9 | C3 | semidirect |
| 4. #737 | C5 | direct (N × H) |
| 8. 3−1+2 | C3×C5 | semidirect |
| 10. C3×C9 | C3×C5 | semidirect |
| 16. C5 | #737 | direct (N × H) |
By isomorphism type — maximal subgroups of the same type appear once, whether or not they are normal.
| subgroup | index |
|---|---|
| C5×3−1+2 | 3 |
| C5×H(3,𝔽3) | 3 |
| C3×C5×C9 | 3 |
| #737 | 5 |