I used a method of cross number system tracking I've posted about earlier, and applied it to Methuselah.
my earlier example works like this:
Total verse gematria of a certain verse ends up being a Strong's greek numbered word that is thematically related.
the strikingly perfect example is from the first mention of Jared (Descend).
that verse is
"And Mahalaleel lived sixty and five years, and begat Jared"
total verse value = 2600
Strong's greek 2600 = katabasis = Descend
using the same principle, look at first mention of Methuselah
"And Enoch lived sixty and five years, and begat Methuselah:"
total verse value = 2718
Strong's greek 2718 = katerchomai
means to: come down, go down, depart, descend, to go from a higher place to a lower place.
Methuselah is the End of the Age. He is the last generation that dies before the Flood at age 969, the longest recorded age of anyone in the Bible.
when a circle has a circumference of 1656 (year of the Flood) then the diameter is 527, Jared's age when Enoch is taken. this ties Jared specifically to the Flood, just like Methuselah, who probably died right before the Flood started.
it looks like both Jared and Methuselah are pointing to The Descending (of the Lord Jesus "Himself") from the famous verses 1 Thessalonians 4:16-17, using these examples.