810265 has 4 divisors (see below), whose sum is σ = 972324. Its totient is φ = 648208.

The previous prime is 810259. The next prime is 810269. The reversal of 810265 is 562018.

810265 = 636² + 637².

It is a happy number.

810265 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 405769 + 404496 = 637^2 + 636^2 .

It is a cyclic number.

It is not a de Polignac number, because 810265 - 2⁷ = 810137 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (810269) 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, 81022 + ... + 81031.

It is an arithmetic number, because the mean of its divisors is an integer number (243081).

2⁸¹⁰²⁶⁵ is an apocalyptic number.

810265 is the 637-th centered square number.

It is an amenable number.

810265 is a deficient number, since it is larger than the sum of its proper divisors (162059).

810265 is a wasteful number, since it uses less digits than its factorization.

810265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162058.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 810265 is about 900.1472101829. The cubic root of 810265 is about 93.2271397074.

The spelling of 810265 in words is "eight hundred ten thousand, two hundred sixty-five".