812269 has 4 divisors (see below), whose sum is σ = 855040. Its totient is φ = 769500.

The previous prime is 812267. The next prime is 812281. The reversal of 812269 is 962218.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 962218 = 2 ⋅481109.

It is not a de Polignac number, because 812269 - 2¹ = 812267 is a prime.

It is a super-2 number, since 2×812269² = 1319561856722, which contains 22 as substring.

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, 21357 + ... + 21394.

It is an arithmetic number, because the mean of its divisors is an integer number (213760).

2⁸¹²²⁶⁹ is an apocalyptic number.

It is an amenable number.

812269 is a deficient number, since it is larger than the sum of its proper divisors (42771).

812269 is a wasteful number, since it uses less digits than its factorization.

812269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42770.

The product of its digits is 1728, while the sum is 28.

The square root of 812269 is about 901.2596740119. The cubic root of 812269 is about 93.3039349020.

It can be divided in two parts, 812 and 269, that added together give a triangular number (1081 = T₄₆).

The spelling of 812269 in words is "eight hundred twelve thousand, two hundred sixty-nine".