925821 has 24 divisors (see below), whose sum is σ = 1482936. Its totient is φ = 552960.

The previous prime is 925789. The next prime is 925823. The reversal of 925821 is 128529.

925821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 44100 + 881721 = 210^2 + 939^2 .

It is not a de Polignac number, because 925821 - 2⁵ = 925789 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (925823) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4701 + ... + 4893.

It is an arithmetic number, because the mean of its divisors is an integer number (61789).

2⁹²⁵⁸²¹ is an apocalyptic number.

It is an amenable number.

925821 is a deficient number, since it is larger than the sum of its proper divisors (557115).

925821 is a wasteful number, since it uses less digits than its factorization.

925821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253 (or 250 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 925821 is about 962.1959259943. The cubic root of 925821 is about 97.4635761381.

The spelling of 925821 in words is "nine hundred twenty-five thousand, eight hundred twenty-one".