3921165 has 24 divisors (see below), whose sum is σ = 6888960. Its totient is φ = 2062944.

The previous prime is 3921161. The next prime is 3921173. The reversal of 3921165 is 5611293.

It is not a de Polignac number, because 3921165 - 2² = 3921161 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3921161) 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 23 ways as a sum of consecutive naturals, for example, 3004 + ... + 4106.

It is an arithmetic number, because the mean of its divisors is an integer number (287040).

Almost surely, 2^3921165 is an apocalyptic number.

It is an amenable number.

3921165 is a deficient number, since it is larger than the sum of its proper divisors (2967795).

3921165 is a wasteful number, since it uses less digits than its factorization.

3921165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1193 (or 1190 counting only the distinct ones).

The product of its digits is 1620, while the sum is 27.

The square root of 3921165 is about 1980.1931723951. The cubic root of 3921165 is about 157.6903217005.

The spelling of 3921165 in words is "three million, nine hundred twenty-one thousand, one hundred sixty-five".