765

765 is a natural number that follows 764 and precedes 766. It is an odd composite number, with a prime factorization of 3^2 × 5 × 17. This factorization shows that 765 has 12 positive divisors.

The divisors of 765, listed in ascending order, are: 1, 3, 5, 9, 15, 17, 45, 51, 85, 153, 255, 765. The number is divisible by 3 and by 9, reflecting its 3^2 factor, and it is also divisible by 5 and by 17, in line with its full factorization. Consequently, 765 is not prime and can be expressed as the product of multiple smaller integers in several ways, such as 9 × 85 and 15 × 51.

In alternate numeral representations, 765 appears as follows: in binary it is 1011111101, in octal it is 1375, and in hexadecimal it is 2FD. In Roman numerals, 765 is written as DCCLXV.

Viewed as a decimal number, 765 is also equal to 9 × 85 and to 3^2 × 5 × 17, underscoring its composite structure. It is not a Harshad number in base 10, since the sum of its digits is 18 and 765 is not divisible by 18. Overall, 765 is a moderate-sized composite with several simple factorizations and a variety of base representations.