810012 has 24 divisors (see below), whose sum is σ = 2160256. Its totient is φ = 231408.

The previous prime is 809993. The next prime is 810013. The reversal of 810012 is 210018.

It is a happy number.

It is a super-2 number, since 2×810012² = 1312238880288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 810012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (810013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4738 + ... + 4905.

2⁸¹⁰⁰¹² is an apocalyptic number.

It is an amenable number.

810012 is an abundant number, since it is smaller than the sum of its proper divisors (1350244).

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

810012 is a wasteful number, since it uses less digits than its factorization.

810012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9657 (or 9655 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 810012 is about 900.0066666420. The cubic root of 810012 is about 93.2174355071.

Subtracting from 810012 its sum of digits (12), we obtain a 4-th power (810000 = 30⁴).

It can be divided in two parts, 81001 and 2, that added together give a triangular number (81003 = T₄₀₂).

The spelling of 810012 in words is "eight hundred ten thousand, twelve".