What does 2.5 million equal to?

2.5 million is equal to 2,500,000. This number is written in standard form, where each digit's place value is a power of 10. Specifically, the 2 represents 2 million, the 5 represents 500,000, and the zeros indicate additional place values of tens, hundreds, thousands, etc. In numerical terms, 2.5 million is 2,500,000.