1. An electrophotographic photosensitive member comprising:

a support, and

a photosensitive layer formed on the support,

wherein a surface layer of the electrophotographic photosensitive member comprises a polymerized product of a composition

comprising a charge transporting compound with a polymerizable functional group represented by formula (1) below,

where,

R1 and R2 each independently represent a hydrogen atom or a straight alkyl group, and

at least one of R1 and R2 is the straight alkyl group, and

wherein the charge transporting compound is a compound represented by formula (3) or (4) below,

where,

Ar1, Ar2, and Ar4 each independently represent a monovalent group represented by formula (M1) below or a substituted or unsubstituted aryl group;

Ar3 represents a divalent group represented by formula (M2) below or a substituted or unsubstituted arylene group; at least one

of Ar1 to Ar4 represents a monovalent group represented by formula (M1) below or a divalent group represented by formula (M2) below; r is

0 or 1; and when none of Ar1, Ar2, and Ar4 is a monovalent group represented by formula (M1) below, r is 1 and Ar3 is a divalent group represented by formula (M2) below;

where,

A5, Ar6, Ar9, and Ar10 each independently represent a monovalent group represented by formula (M1) below or a substituted or unsubstituted aryl group;

Ar7 and Ar8 each independently represent a divalent group represented by formula (M2) below or a substituted or unsubstituted arylene

group; at least one of A5 to Ar8 is a monovalent group represented by formula (M1) below or a divalent group represented by formula (M2) below; P1 represents an oxygen atom, a cycloalkylidene group, a divalent group having two phenylene groups bonded through an oxygen

atom, or an ethylene group; s and t each independently represent 0 or 1; and when none of A5, Ar6, Ar9, and Ar10 is a monovalent group represented by formula (M1) below and Ar7 is not a divalent group represented by formula (M2) below, t is 1 and Ar8 is a divalent group represented by formula (M2) below;

where,

R1 and R2 are the same as R1 and R2 in formula (1), Ar11 represents a substituted or unsubstituted arylene group, and m represents an integer of 1 or more:

where,

R1 and R2 are the same as R1 and R2 in formula (1), Ar12 represents a substituted or unsubstituted trivalent aromatic hydrocarbon group, and n represents an integer of 1 or more.