810612 has 72 divisors (see below), whose sum is σ = 2358720. Its totient is φ = 232320.

The previous prime is 810587. The next prime is 810643. The reversal of 810612 is 216018.

810612 = T₈₈ + T₈₉ + ... + T₁₇₆.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 810612.

It is an unprimeable number.

810612 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 23 ways as a sum of consecutive naturals, for example, 9064 + ... + 9152.

It is an arithmetic number, because the mean of its divisors is an integer number (32760).

2⁸¹⁰⁶¹² is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 810612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1179360).

810612 is an abundant number, since it is smaller than the sum of its proper divisors (1548108).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

810612 is a wasteful number, since it uses less digits than its factorization.

810612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133 (or 128 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 810612 is about 900.3399358020. The cubic root of 810612 is about 93.2404461362.

It can be divided in two parts, 8106 and 12, that added together give a palindrome (8118).

The spelling of 810612 in words is "eight hundred ten thousand, six hundred twelve".