piano chord
C♯5
C♯1G♯5
Root and fifth, no third at all — neither major nor minor, which is the point.
Written the other way round it is D♭5 — the same twelve keys on a piano, a different piece of notation.
What is true of it
C♯5 is C♯ and G♯ — 1 and 5 counted from C♯.