Which of the following prefixes denotes one million (10⁶)?

The prefix that denotes one million, or (10^6), is "Mega." This prefix is commonly used in various fields, including chemistry and physics, to simplify the representation of large quantities. For instance, a megabyte (MB) is one million bytes, and a megawatt (MW) is one million watts.

Using scientific notation and a prefix helps make communication regarding large numbers clearer and more manageable. In contrast to "Mega," the other prefixes mentioned represent different powers of ten: "Deci" denotes (10^{-1}) or one-tenth, "Kilo" denotes (10^3) or one thousand, and "Centi" denotes (10^{-2}) or one-hundredth. Understanding these prefixes is crucial for accurate interpretation of measurements in scientific contexts.