Electrophotographic photoreceptor, process cartridge, and image forming apparatus

An electrophotographic photoreceptor, comprising:

• a conductive substrate;
• a photosensitive layer;
• and
• a protective layer,
• the protective layer being a top surface layer of the electrophotographic photoreceptor and including a photocurable resin,
• the photosensitive layer including a charge generating agent and a hole transporting agent,
• the hole transporting agent including a compound that has a molecular weight of 580 or more and is represented by a formula (1), (2), (3), or (4).
• (In the formula (1), R41, R42, R43, R44, R45, and R46 each independently represent an alkyl group having 1 or more and 8 or less carbon atoms or a phenyl group, R47 and R48 each independently represent a hydrogen atom, an alkyl group having 1 or more and 8 or less carbon atoms, or a phenyl group, e1, e2, e3, and e4 each independently represent an integer of 0 or more and 5 or less, e5 and e6 each independently represent an integer of 0 or more and 4 or less, and e7 and es each independently represent 0 or 1,
• in the formula (2), R50, R51, and R54 each independently represent an alkyl group having 1 or more and 8 or less carbon atoms or a phenyl group, R52 and R53 each independently represent a hydrogen atom, an alkyl group having 1 or more and 8 or less carbon atoms, or a phenyl group that may be substituted with an alkyl group having 1 or more and 8 or less carbon atoms, and f3, f4, and f5 each independently represent an integer of 0 or more and 5 or less,
• in the formula (3), R11, R12, R13, and R14 each independently represent an alkyl group having 1 or more and 8 or less carbon atoms or a phenyl group, a1, a2, a3, and a4 each independently represent an integer of 0 or more and 5 or less, and
• in the formula (4), R21, R22, R23, R24, R2′, and R26 each independently represent an alkenyl group having 2 or more and 6 or less carbon atoms that may be substituted with at least one phenyl group or an alkyl group having 1 or more and 8 or less carbon atoms, b1, b2, b4, and b5 each independently represent an integer of 0 or more and 5 or less, and b3 and b6 each independently represent an integer of 0 or more and 4 or less.)