802665 has 12 divisors (see below), whose sum is σ = 1391364. Its totient is φ = 428064.

The previous prime is 802661. The next prime is 802667. The reversal of 802665 is 566208.

It can be written as a sum of positive squares in 2 ways, for example, as 501264 + 301401 = 708^2 + 549^2 .

It is not a de Polignac number, because 802665 - 2² = 802661 is a prime.

It is a super-2 number, since 2×802665² = 1288542204450, which contains 22 as substring.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 802665.

It is not an unprimeable number, because it can be changed into a prime (802661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8874 + ... + 8963.

It is an arithmetic number, because the mean of its divisors is an integer number (115947).

2⁸⁰²⁶⁶⁵ is an apocalyptic number.

It is an amenable number.

802665 is a deficient number, since it is larger than the sum of its proper divisors (588699).

802665 is a wasteful number, since it uses less digits than its factorization.

802665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17848 (or 17845 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 802665 is about 895.9157326445. The cubic root of 802665 is about 92.9347443717.

The spelling of 802665 in words is "eight hundred two thousand, six hundred sixty-five".