mille et milliers

Question

So when does one use mille and milliers de?  Are they interchangeable?

Accepted Answer

Bonjour Mike,
That's right. They are interchangeable. You could use both "mille" and "un millier de" as it is mentioned in this lesson: https://french.kwiziq.com/revision/grammar/how-to-express-large-numbers-in-french-such-as-thousands-millions-and-billions-numbers
Bonne journée.