1445

1445 may refer to the year 1445 CE or to the integer 1445. In Roman numerals, 1445 is written as MCDXLV. In hexadecimal it is 0x5A5, and in octal it is 2645. The prime factorization of 1445 is 5 × 17^2, making it a composite number with divisors such as 1, 5, 17, 85, 289, and 1445.

As a year, 1445 falls in the late Middle Ages. In Europe, the period was shaped by ongoing conflicts and the gradual emergence of cultural and technical developments that would contribute to the Renaissance. Trade, urban growth, and scholastic activity continued to expand in various regions, even as political boundaries and alliances shifted. Outside Europe, diverse political entities and trade networks were shaping global connections, while major powers in Asia and the Middle East pursued their own trajectories of state-building and conquest. The year sits in a transitional era between medieval society and early modern developments.

The number 1445 also appears in mathematical contexts beyond its basic factorization. It is not a prime, and its representation in common bases highlights its unusual digit pattern: the decimal digits are 1, 4, 4, and 5. In base systems other than decimal, 1445 has the representations noted above (0x5A5 in hex, 2645 in octal). Its binary form is 10110100101.

See also: 1445 (disambiguation) for other uses of the number in culture, science, and media.