The present invention relates to a stator for an electric motor, which extends in an axial direction from a first end to a second end, wherein the stator has an end face which delimits said stator at each of the two ends, wherein the end faces have a first spacing from one another in the axial direction, and wherein the stator also has an outer surface which delimits same and connects the end faces to one another, and which has a second spacing from the axis in the radial direction relative to the axis, wherein the first spacing changes in the axial and/or tangential direction and/or the second spacing changes in the radial and/or tangential direction. The present invention further relates to a stator which is produced from a plurality of laminations and has mounting means which are provided for mounting the stator in a housing which at least partially surrounds said stator, wherein for acoustic decoupling of the stator from the housing the mounting means are at least partially produced from the laminations. The present invention further relates to an assembly having such a stator and a housing which is disposed on the stator.