Way less than a million! I believe usually in the order of thousands.
The Motorola 68000, a great CPU with 32-bit operands, was initially implemented with 68,000 transistors.
The model number was decided long before the transistor-level design was finalized.
Indeed. The 6502 had 3510 enhancement transistors and 1018 depletion transistors for a total of 4528...