How long wil 1400000 last in retirement?

Depends on the currency, where you live, and how you plan to live (lifestyle). If the amount is $1,400,000 in US dollars, that can be invested. A reasonable rate of return is around 4%, which would generate an income of $56,000 a year (before taxes) and would last forever. In many parts of the US, you can live comfortably and modestly on $56,000 a year.