3611865 has 16 divisors (see below), whose sum is σ = 5803200. Its totient is φ = 1918272.

The previous prime is 3611849. The next prime is 3611869. The reversal of 3611865 is 5681163.

It is not a de Polignac number, because 3611865 - 2⁴ = 3611849 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3611869) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 5526 + ... + 6144.

It is an arithmetic number, because the mean of its divisors is an integer number (362700).

Almost surely, 2^3611865 is an apocalyptic number.

It is an amenable number.

3611865 is a deficient number, since it is larger than the sum of its proper divisors (2191335).

3611865 is a wasteful number, since it uses less digits than its factorization.

3611865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016.

The product of its digits is 4320, while the sum is 30.

The square root of 3611865 is about 1900.4907261021. The cubic root of 3611865 is about 153.4300770492.

The spelling of 3611865 in words is "three million, six hundred eleven thousand, eight hundred sixty-five".