801564 has 12 divisors (see below), whose sum is σ = 1870344. Its totient is φ = 267184.

The previous prime is 801557. The next prime is 801569. The reversal of 801564 is 465108.

801564 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 (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (801569) by changing a digit.

801564 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 3 ways as a sum of consecutive naturals, for example, 33387 + ... + 33410.

It is an arithmetic number, because the mean of its divisors is an integer number (155862).

2⁸⁰¹⁵⁶⁴ is an apocalyptic number.

It is an amenable number.

801564 is an abundant number, since it is smaller than the sum of its proper divisors (1068780).

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

801564 is a wasteful number, since it uses less digits than its factorization.

801564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66804 (or 66802 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 801564 is about 895.3010666809. The cubic root of 801564 is about 92.8922326667.

The spelling of 801564 in words is "eight hundred one thousand, five hundred sixty-four".