425

425 is a natural number that follows 424 and precedes 426. In decimal notation it ends with the digit 5, making it divisible by 5. Its prime factorization is 5^2 × 17, i.e., 425 = 25 × 17. As a sum of digits, 4+2+5 equals 11, so it is not divisible by 3. In Roman numerals, 425 is written as CDXXV.

In the calendar, 425 refers to the year AD 425 (or 425 CE), a point in late antiquity during the Roman Empire era. Historians use the year in dating events across different regions, though specific occurrences vary by source.

Area code 425 is a telephone area code in the North American Numbering Plan for parts of Washington state, United States. It was created in 1997 as a split from area code 206 to serve the Eastside region around Seattle, including communities such as Bellevue, Redmond, and Kirkland. The code is now used alongside other local area codes in the same region.