3665985 has 8 divisors (see below), whose sum is σ = 5865600. Its totient is φ = 1955184.

The previous prime is 3665941. The next prime is 3665989. The reversal of 3665985 is 5895663.

3665985 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 not a de Polignac number, because 3665985 - 2¹³ = 3657793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3665989) 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, 122185 + ... + 122214.

It is an arithmetic number, because the mean of its divisors is an integer number (733200).

Almost surely, 2^3665985 is an apocalyptic number.

It is an amenable number.

3665985 is a deficient number, since it is larger than the sum of its proper divisors (2199615).

3665985 is a wasteful number, since it uses less digits than its factorization.

3665985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244407.

The product of its digits is 194400, while the sum is 42.

The square root of 3665985 is about 1914.6762128360. The cubic root of 3665985 is about 154.1926105190.

The spelling of 3665985 in words is "three million, six hundred sixty-five thousand, nine hundred eighty-five".