Lichess does not use standard rating system. I think it uses Glicko.

A 1740 on lichess would be around 1600 in standard ELO (which itself is not a bad rating)

It took me the longest time to figure out that "lichess" was not a female lich.

It's hard to compare Lichess-rated players to e.g. FIDE or USCF rated players, since they have different populations. It's much easier to play on Lichess than in tournaments, so Lichess probably gives higher ratings. But one could get a sample of people rated on both sites to get an idea of the rating conversion.

Actually more like 1400-1500 USCF according to these survey results https://docs.google.com/spreadsheets/d/1GcVG_slcTUJfi0sQMeax...