5581685 has 4 divisors (see below), whose sum is σ = 6698028. Its totient is φ = 4465344.

The previous prime is 5581679. The next prime is 5581691. The reversal of 5581685 is 5861855.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (5581679) and next prime (5581691).

It can be written as a sum of positive squares in 2 ways, for example, as 2735716 + 2845969 = 1654^2 + 1687^2 .

It is a cyclic number.

It is not a de Polignac number, because 5581685 - 2¹⁶ = 5516149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 558164 + ... + 558173.

It is an arithmetic number, because the mean of its divisors is an integer number (1674507).

Almost surely, 2^5581685 is an apocalyptic number.

It is an amenable number.

5581685 is a deficient number, since it is larger than the sum of its proper divisors (1116343).

5581685 is a wasteful number, since it uses less digits than its factorization.

5581685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1116342.

The product of its digits is 48000, while the sum is 38.

The square root of 5581685 is about 2362.5589939724. The cubic root of 5581685 is about 177.3869941281.

The spelling of 5581685 in words is "five million, five hundred eighty-one thousand, six hundred eighty-five".