821052 has 18 divisors (see below), whose sum is σ = 2075528. Its totient is φ = 273672.

The previous prime is 821039. The next prime is 821053. The reversal of 821052 is 250128.

821052 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (821053) by changing a digit.

821052 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, 11368 + ... + 11439.

2⁸²¹⁰⁵² is an apocalyptic number.

It is an amenable number.

821052 is an abundant number, since it is smaller than the sum of its proper divisors (1254476).

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

821052 is a wasteful number, since it uses less digits than its factorization.

821052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22817 (or 22812 counting only the distinct ones).

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

The square root of 821052 is about 906.1191974569. The cubic root of 821052 is about 93.6390260228.

The spelling of 821052 in words is "eight hundred twenty-one thousand, fifty-two".