It depends on what kind of numerals you are talking about:
In Arabic numerals, it is 1000.
In Roman numerals, it is M.
1.2 thousand in numerals is: 1200.
Six hundred and fifty thousand in numerals is 650,000
M
1000 in roman numerals = M
In Roman Numerals one thousand is written as M.
1.2 thousand in numerals is: 1200.
Nine thousand using standard numerals is 9,000
Six hundred and fifty thousand in numerals is 650,000
Seven thousand six hundred and four in numerals is 7,604.
M
Forty thousand in numerals is 40,000. Pounds cannot be written in numerals and in any case, depends on whether you mean mass or currency.
In Roman Numerals one thousand is written as M.
1000 in roman numerals = M
(V) and (M) or V and M but with an horizontal line above the numerals to indicate multiplication by a thousand. Numerals in brackets also indicate multiplication by a thousand.
"M" = thousand (from Roman numerals) "MM" = thousand thousand = million
Two hundred thousand is 200,000
Four thousand and two is 4002.