Il numero romano MMMMCXLII nel sistema decimale vale: 4142.
MMMMCXLII in latino si scrive quattuor milia centum quadraginta duo,
mentre in italiano quattromilacentoquarantadue.
MMMMCXXIII, MMMMCXXIV, MMMMCXXV, MMMMCXXVI, MMMMCXXVII, MMMMCXXVIII, MMMMCXXIX, MMMMCXXX, MMMMCXXXI, MMMMCXXXII, MMMMCXXXIII, MMMMCXXXIV, MMMMCXXXV, MMMMCXXXVI, MMMMCXXXVII, MMMMCXXXVIII, MMMMCXXXIX, MMMMCXL, MMMMCXLI, MMMMCXLIII, MMMMCXLIV, MMMMCXLV, MMMMCXLVI, MMMMCXLVII, MMMMCXLVIII, MMMMCXLIX, MMMMCL, MMMMCLI, MMMMCLII, MMMMCLIII, MMMMCLIV, MMMMCLV, MMMMCLVI, MMMMCLVII, MMMMCLVIII, MMMMCLIX, MMMMCLX, MMMMCLXI