3911865 has 8 divisors (see below), whose sum is σ = 6259008. Its totient is φ = 2086320.

The previous prime is 3911861. The next prime is 3911879. The reversal of 3911865 is 5681193.

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

It is not a de Polignac number, because 3911865 - 2² = 3911861 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3911861) 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 7 ways as a sum of consecutive naturals, for example, 130381 + ... + 130410.

It is an arithmetic number, because the mean of its divisors is an integer number (782376).

Almost surely, 2^3911865 is an apocalyptic number.

It is an amenable number.

3911865 is a deficient number, since it is larger than the sum of its proper divisors (2347143).

3911865 is a wasteful number, since it uses less digits than its factorization.

3911865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260799.

The product of its digits is 6480, while the sum is 33.

The square root of 3911865 is about 1977.8435226276. The cubic root of 3911865 is about 157.5655559803.

The spelling of 3911865 in words is "three million, nine hundred eleven thousand, eight hundred sixty-five".