What are the numbers from 1 to a 1000000 in Roman numerals?

Answer 1

What are all the prime numbers in Roman numerals?

Answer 2

Notwithstanding todays configuration of Roman numerals inasmuch that there is evidence to suggest that the ancient Romans would have written the equivalent of one to a million as follows:-

Units: I, II, III, IIII, V, VI, VII, VIII and VIIII

Tens: X, XX, XXX, XXXX, L, LX, LXX, LXXX and LXXXX

Hundreds: C, CC, CCC, CCCC, D, DC, DCC, DCCC and DCCCC

Thousands: (I), (II), (III), (IIII), (V), (VI), (VII), (VIII) and (VIIII)

Tens of thousands: (X), (XX), (XXX), (XXXX), (L), (LX), (LXX), (LXXX) and (LXXXX)

Hundreds of thousands: (C), (CC), (CCC), (CCCC), (D), (DC), (DCC), (DCCC) and (DCCCC)

Million: (M)

To select any numerals simply write them out in descending order and then abridge them whenever possible as in the following examples:-

900,000 = (DCCCC) = (CM)

90,000 = (LXXXX) = (XC)

9,000 = (VIIII) = (IX)

900 = DCCCC = C(I) or as CM

90 = LXXXX = XC

9 = VIIII = IX

999,999 = (DCCCCLXXXXVIIII)DCCCCLXXXXVIIII = I(M)

Check:-

(CM)+(XC) = (XM) = 990,000

(XM)+(IX) = (IM) = 999,000

(IM)+CM = C(M) = 999,900

C(M)+XC = X(M) = 999,990

X(M)+IX = I(M) = 999,999

Note that numerals within brackets indicate multiplication by a thousand and that the practice of placing a bar above a numeral to indicate multiplication by a thousand was introduced during the Middle Ages along with other rules and regulations governing todays Roman numeral system.

QED