2585921 has 8 divisors (see below), whose sum is σ = 2948904. Its totient is φ = 2246400.

The previous prime is 2585909. The next prime is 2585929. The reversal of 2585921 is 1295852.

2585921 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 583696 + 2002225 = 764^2 + 1415^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2585921 - 2¹⁸ = 2323777 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2585929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5630 + ... + 6071.

It is an arithmetic number, because the mean of its divisors is an integer number (368613).

2^2585921 is an apocalyptic number.

It is an amenable number.

2585921 is a deficient number, since it is larger than the sum of its proper divisors (362983).

2585921 is a wasteful number, since it uses less digits than its factorization.

2585921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11731.

The product of its digits is 7200, while the sum is 32.

The square root of 2585921 is about 1608.0799109497. The cubic root of 2585921 is about 137.2582374234.

The spelling of 2585921 in words is "two million, five hundred eighty-five thousand, nine hundred twenty-one".