Il numero romano MMMCXLII nel sistema decimale vale: 3142.
MMMCXLII in latino si scrive tria milia centum quadraginta duo,
mentre in italiano tremilacentoquarantadue.
MMMCXXIII, MMMCXXIV, MMMCXXV, MMMCXXVI, MMMCXXVII, MMMCXXVIII, MMMCXXIX, MMMCXXX, MMMCXXXI, MMMCXXXII, MMMCXXXIII, MMMCXXXIV, MMMCXXXV, MMMCXXXVI, MMMCXXXVII, MMMCXXXVIII, MMMCXXXIX, MMMCXL, MMMCXLI, MMMCXLIII, MMMCXLIV, MMMCXLV, MMMCXLVI, MMMCXLVII, MMMCXLVIII, MMMCXLIX, MMMCL, MMMCLI, MMMCLII, MMMCLIII, MMMCLIV, MMMCLV, MMMCLVI, MMMCLVII, MMMCLVIII, MMMCLIX, MMMCLX, MMMCLXI