The expression "1 x 10^6" represents the number one million. In this notation, "10^6" means ten raised to the power of six, which equals 1,000,000. This way of writing large numbers is called scientific notation, and it helps simplify calculations and comparisons, especially in fields like science and engineering. Using scientific notation makes it easier to work with very large or very small numbers. For example, instead of writing 1,000,000, you can simply write "1 x 10^6." This is particularly useful in contexts like data analysis or finance, where large quantities are common.