805212 has 18 divisors (see below), whose sum is σ = 2035488. Its totient is φ = 268392.

The previous prime is 805187. The next prime is 805213. The reversal of 805212 is 212508.

It is a tau number, because it is divible by the number of its divisors (18).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (805213) by changing a digit.

805212 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11148 + ... + 11219.

2⁸⁰⁵²¹² is an apocalyptic number.

It is an amenable number.

805212 is an abundant number, since it is smaller than the sum of its proper divisors (1230276).

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

805212 is a wasteful number, since it uses less digits than its factorization.

805212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22377 (or 22372 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 805212 is about 897.3360574501. The cubic root of 805212 is about 93.0329401177.

Subtracting from 805212 its reverse (212508), we obtain a cube (592704 = 84³).

The spelling of 805212 in words is "eight hundred five thousand, two hundred twelve".