625

625 is the natural number that comes after 624 and before 626. In Roman numerals it is written as DCXXV.

In mathematics, 625 equals 5 to the fourth power (5^4) and is a perfect square (25^2), making it a fourth power as well. Its prime factorization is 5^4, and its positive divisors are 1, 5, 25, 125, and 625.

In other numeral systems, decimal 625 converts to binary 1001110001, octal 1161, and hexadecimal 0x271.

Historically, the year AD 625 saw events in the early Islamic period, including the Battle of Uhud near Medina.

In technology and media, 625-line refers to an analogue television standard used in many PAL and SECAM regions, characterized by 625 lines per frame with a 50 Hz field rate (25 frames per second).