Wanna live like a champ? Got $1.5 million?

Then you can buy Mike Tyson's huge Las Vegas palace ... that looks like a modern boutique hotel.

Tyson has lived in the 5,800 square foot pad since 2008 but has decided it's time for a change -- moving out of the 5 bedroom, 6 bathroom mansion for a bigger place down the road.

But the old house ain't too shabby ... 3 fireplaces, a wine cellar, media room, hot tub, infinity pool and a WATERFALL in the front entry way!

Tyson's realtor, Ken Lowman, says the whole place was remodeled earlier this year -- and looks awesome.

The only thing that's missing ... there's no real tiger cage like the one he supposedly has in his home in "The Hangover."