Over 2.2 million units.. here the great news:
Sega Sammy announces that more than 2.2 million units of the role-playing game Persona 5 have been sold worldwide by Atlus.
https://www.segasammy.co.jp/japanese/ir/library/pdf/settlement/2018/20180514_rt2020_j_final.pdf
The game is a big success in the west, japan and worldwide (ratings and sales figures).