"Сто тисяч доларів"

Translation: One hundred thousand dollars

[hr1982]

It accepted numbers for everything up until this one ...

[bw1909]

the "1" is not necessary in my opinion

[gksterling]

In Standard American English it is. You would have to at least specify "a hundred thousand" and that's non-standard.

[YaaTwe1]

Couldn't you use numbers to make it easier?