An approximate analytical expression is obtained for the parity violating electromagnetic, so-called anapole, moment of a spherical nucleus. The result iis confirmed by numerical computation in the Woods-Saxon potential for the nuclei ¹³³Cs, ^203,205Tl, ²⁰⁷Pb, ²⁰⁹Bi. The effective coupling constant of the electromagnetic P-odd electron-nucleus interaction constitutes 0.3-0.4 of the Fermi constant.