Il numero romano MMDCCXLII nel sistema decimale vale: 2742.
MMDCCXLII in latino si scrive duo milia septingenti quadraginta duo,
mentre in italiano duemilasettecentoquarantadue.
MMDCCXXIII, MMDCCXXIV, MMDCCXXV, MMDCCXXVI, MMDCCXXVII, MMDCCXXVIII, MMDCCXXIX, MMDCCXXX, MMDCCXXXI, MMDCCXXXII, MMDCCXXXIII, MMDCCXXXIV, MMDCCXXXV, MMDCCXXXVI, MMDCCXXXVII, MMDCCXXXVIII, MMDCCXXXIX, MMDCCXL, MMDCCXLI, MMDCCXLIII, MMDCCXLIV, MMDCCXLV, MMDCCXLVI, MMDCCXLVII, MMDCCXLVIII, MMDCCXLIX, MMDCCL, MMDCCLI, MMDCCLII, MMDCCLIII, MMDCCLIV, MMDCCLV, MMDCCLVI, MMDCCLVII, MMDCCLVIII, MMDCCLIX, MMDCCLX, MMDCCLXI