811212 has 12 divisors (see below), whose sum is σ = 1892856. Its totient is φ = 270400.

The previous prime is 811207. The next prime is 811231. The reversal of 811212 is 212118.

It is a tau number, because it is divible by the number of its divisors (12).

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 811191 and 811200.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33789 + ... + 33812.

It is an arithmetic number, because the mean of its divisors is an integer number (157738).

2⁸¹¹²¹² is an apocalyptic number.

It is an amenable number.

811212 is an abundant number, since it is smaller than the sum of its proper divisors (1081644).

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

811212 is a wasteful number, since it uses less digits than its factorization.

811212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67608 (or 67606 counting only the distinct ones).

The product of its digits is 32, while the sum is 15.

The square root of 811212 is about 900.6730816451. The cubic root of 811212 is about 93.2634454135.

It can be divided in two parts, 8112 and 12, that multiplied together give a square (97344 = 312²).

The spelling of 811212 in words is "eight hundred eleven thousand, two hundred twelve".