811263 has 4 divisors (see below), whose sum is σ = 1081688. Its totient is φ = 540840.

The previous prime is 811259. The next prime is 811273. The reversal of 811263 is 362118.

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

It is not a de Polignac number, because 811263 - 2² = 811259 is a prime.

It is a D-number.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811253) 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, 135208 + ... + 135213.

It is an arithmetic number, because the mean of its divisors is an integer number (270422).

2⁸¹¹²⁶³ is an apocalyptic number.

811263 is a deficient number, since it is larger than the sum of its proper divisors (270425).

811263 is a wasteful number, since it uses less digits than its factorization.

811263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270424.

The product of its digits is 288, while the sum is 21.

The square root of 811263 is about 900.7013933596. The cubic root of 811263 is about 93.2653998290.

The spelling of 811263 in words is "eight hundred eleven thousand, two hundred sixty-three".