2128585 has 8 divisors (see below), whose sum is σ = 2568456. Its totient is φ = 1693440.

The previous prime is 2128561. The next prime is 2128591. The reversal of 2128585 is 5858212.

It can be written as a sum of positive squares in 4 ways, for example, as 898704 + 1229881 = 948^2 + 1109^2 .

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

It is not a de Polignac number, because 2128585 - 2¹⁹ = 1604297 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96 + ... + 2065.

It is an arithmetic number, because the mean of its divisors is an integer number (321057).

2^2128585 is an apocalyptic number.

It is an amenable number.

2128585 is a deficient number, since it is larger than the sum of its proper divisors (439871).

2128585 is a wasteful number, since it uses less digits than its factorization.

2128585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2363.

The product of its digits is 6400, while the sum is 31.

The square root of 2128585 is about 1458.9671003830. The cubic root of 2128585 is about 128.6363373020.

The spelling of 2128585 in words is "two million, one hundred twenty-eight thousand, five hundred eighty-five".