The complement of this graph is the Kneser graph $\mathrm{K}(42,2)$.
| Number of vertices: | $861$ |
| Diameter: | $2$ |
| Intersection array: | $\{80,39;1,4\}$ |
| Spectrum: | $80^1 38^{41} (-2)^{819}$ |
| Automorphism group: | $\mathrm{S}_{42}$ |
| Distance-transitive: | Yes |
| Primitive |