805265 has 4 divisors (see below), whose sum is σ = 966324. Its totient is φ = 644208.

The previous prime is 805249. The next prime is 805267. The reversal of 805265 is 562508.

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 410881 + 394384 = 641^2 + 628^2 .

It is a cyclic number.

It is not a de Polignac number, because 805265 - 2⁴ = 805249 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (805267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80522 + ... + 80531.

It is an arithmetic number, because the mean of its divisors is an integer number (241581).

2⁸⁰⁵²⁶⁵ is an apocalyptic number.

It is an amenable number.

805265 is a deficient number, since it is larger than the sum of its proper divisors (161059).

805265 is a wasteful number, since it uses less digits than its factorization.

805265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161058.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 805265 is about 897.3655888210. The cubic root of 805265 is about 93.0349812521.

The spelling of 805265 in words is "eight hundred five thousand, two hundred sixty-five".