Whole Numbers and Ordinal Numbers: 100,000 to 999,999
Numbers from 100,000 through 900,000, counting by hundred thousands, are:
100,000th one hundred thousandth
200,000th two hundred thousandth
300,000th three hundred thousandth
400,000th four hundred thousandth
500,000th five hundred thousandth
600,000th six hundred thousandth
700,000th seven hundred thousandth
800,000th eight hundred thousandth
900,000th nine hundred thousandth
Ordinal numbers above 99th are not written out in words in everyday use. Sometimes you see ordinal numbers written out on a formal document such as a college degree.
In American English, we write 224,000th as two hundred twenty-four thousandth. We write 875,003rd as eight hundred seventy-five thousand third.
In British English, 224,000th as two hundred twenty-four and thousandth. We write 875,003rd as eight hundred seventy-five thousand and third.