3971165 has 16 divisors (see below), whose sum is σ = 5256576. Its totient is φ = 2856000.

The previous prime is 3971153. The next prime is 3971167. The reversal of 3971165 is 5611793.

It is a de Polignac number, because none of the positive numbers 2^k-3971165 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3971167) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5315 + ... + 6015.

It is an arithmetic number, because the mean of its divisors is an integer number (328536).

Almost surely, 2^3971165 is an apocalyptic number.

It is an amenable number.

3971165 is a deficient number, since it is larger than the sum of its proper divisors (1285411).

3971165 is a wasteful number, since it uses less digits than its factorization.

3971165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820.

The product of its digits is 5670, while the sum is 32.

The square root of 3971165 is about 1992.7782114425. The cubic root of 3971165 is about 158.3577456972.

The spelling of 3971165 in words is "three million, nine hundred seventy-one thousand, one hundred sixty-five".