3901665 has 8 divisors (see below), whose sum is σ = 6242688. Its totient is φ = 2080880.

The previous prime is 3901661. The next prime is 3901673. The reversal of 3901665 is 5661093.

It is a happy number.

3901665 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 3901665 - 2² = 3901661 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3901661) 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, 130041 + ... + 130070.

It is an arithmetic number, because the mean of its divisors is an integer number (780336).

Almost surely, 2^3901665 is an apocalyptic number.

It is an amenable number.

3901665 is a deficient number, since it is larger than the sum of its proper divisors (2341023).

3901665 is a wasteful number, since it uses less digits than its factorization.

3901665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260119.

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 3901665 is about 1975.2632735916. The cubic root of 3901665 is about 157.4284885739.

The spelling of 3901665 in words is "three million, nine hundred one thousand, six hundred sixty-five".