1000, one thousand, you had it correct.
One hundred fifty thousand
One possibility is the number, thousand. (One thousand written 1000.)
one thousand and fourteen
The number 9001 is "nine thousand one" or "nine thousand and one."
One thousand.
twenty-one thousand
One hundred thousand
One thousand nineteen.
One Thousand
one thousand
The number 10001 is "ten thousand one" (also ten thousand and one).
The number 2000 is written "two thousand."