piano chord
A♭
A♭1C3E♭5
A major third and a perfect fifth over the root.
Written the other way round it is G♯ — the same twelve keys on a piano, a different piece of notation.
What is true of it
A♭ is A♭, C and E♭ — 1, 3 and 5 counted from A♭.
On an instrument that cannot reach all 3, the 5 goes first, in that order.