802765 has 4 divisors (see below), whose sum is σ = 963324. Its totient is φ = 642208.

The previous prime is 802759. The next prime is 802777. The reversal of 802765 is 567208.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 491401 + 311364 = 701^2 + 558^2 .

It is a cyclic number.

It is not a de Polignac number, because 802765 - 2⁵ = 802733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80272 + ... + 80281.

It is an arithmetic number, because the mean of its divisors is an integer number (240831).

2⁸⁰²⁷⁶⁵ is an apocalyptic number.

It is an amenable number.

802765 is a deficient number, since it is larger than the sum of its proper divisors (160559).

802765 is a wasteful number, since it uses less digits than its factorization.

802765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160558.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 802765 is about 895.9715397266. The cubic root of 802765 is about 92.9386036358.

The spelling of 802765 in words is "eight hundred two thousand, seven hundred sixty-five".