812263 has 4 divisors (see below), whose sum is σ = 816040. Its totient is φ = 808488.

The previous prime is 812257. The next prime is 812267. The reversal of 812263 is 362218.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-812263 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1545 + ... + 2002.

It is an arithmetic number, because the mean of its divisors is an integer number (204010).

2⁸¹²²⁶³ is an apocalyptic number.

812263 is a deficient number, since it is larger than the sum of its proper divisors (3777).

812263 is a wasteful number, since it uses less digits than its factorization.

812263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3776.

The product of its digits is 576, while the sum is 22.

The square root of 812263 is about 901.2563453313. The cubic root of 812263 is about 93.3037051649.

The spelling of 812263 in words is "eight hundred twelve thousand, two hundred sixty-three".