3805561 has 8 divisors (see below), whose sum is σ = 3938624. Its totient is φ = 3674160.

The previous prime is 3805547. The next prime is 3805573. The reversal of 3805561 is 1655083.

3805561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 3805561 - 2¹⁹ = 3281273 is a prime.

It is a Duffinian number.

3805561 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3805531) 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, 5716 + ... + 6346.

It is an arithmetic number, because the mean of its divisors is an integer number (492328).

Almost surely, 2^3805561 is an apocalyptic number.

It is an amenable number.

3805561 is a deficient number, since it is larger than the sum of its proper divisors (133063).

3805561 is a wasteful number, since it uses less digits than its factorization.

3805561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 3805561 is about 1950.7847139036. The cubic root of 3805561 is about 156.1251598021.

The spelling of 3805561 in words is "three million, eight hundred five thousand, five hundred sixty-one".