Faramir's age.

[Aganzir]

Besides having Númenorean blood, I've always thought Tolkien let special and/or particularly good people live longer, Aragorn and Faramir who both had longer lifespans than their average countrymen being cases in point in my mind. I didn't remember Elendil's age, but the theory works with it too.

Anyway, here's an essay complete with graphs: Decline of the Lifespan of the Númenoreans. It's written by an (inactive) Downer called Alcuin, whose awesome website I consult whenever I need information about the (lifespans of the) Stewards of Gondor or the Princes of Dol Amroth for RPGing purposes.

Originally Posted by Alcuin

Tolkien noted that the long lifespan of the Númenóreans was “brought about by assimilation of their mode of life to that of the Eldar … ‘Clinging to life’, and so in the end dying perforce and involuntarily, was one of the changes brought about by the Shadow and the rebellion of the Númenóreans; it was also accompanied by a shrinking of their natural life-span.”