Il numero romano MMMDCCXLII nel sistema decimale vale: 3742.
MMMDCCXLII in latino si scrive tria milia septingenti quadraginta duo,
mentre in italiano tremilasettecentoquarantadue.
MMMDCCXXIII, MMMDCCXXIV, MMMDCCXXV, MMMDCCXXVI, MMMDCCXXVII, MMMDCCXXVIII, MMMDCCXXIX, MMMDCCXXX, MMMDCCXXXI, MMMDCCXXXII, MMMDCCXXXIII, MMMDCCXXXIV, MMMDCCXXXV, MMMDCCXXXVI, MMMDCCXXXVII, MMMDCCXXXVIII, MMMDCCXXXIX, MMMDCCXL, MMMDCCXLI, MMMDCCXLIII, MMMDCCXLIV, MMMDCCXLV, MMMDCCXLVI, MMMDCCXLVII, MMMDCCXLVIII, MMMDCCXLIX, MMMDCCL, MMMDCCLI, MMMDCCLII, MMMDCCLIII, MMMDCCLIV, MMMDCCLV, MMMDCCLVI, MMMDCCLVII, MMMDCCLVIII, MMMDCCLIX, MMMDCCLX, MMMDCCLXI