3975657 has 24 divisors (see below), whose sum is σ = 6291648. Its totient is φ = 2187360.

The previous prime is 3975649. The next prime is 3975659. The reversal of 3975657 is 7565793.

It is not a de Polignac number, because 3975657 - 2³ = 3975649 is a prime.

3975657 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3975659) 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, 20083 + ... + 20279.

It is an arithmetic number, because the mean of its divisors is an integer number (262152).

Almost surely, 2^3975657 is an apocalyptic number.

It is an amenable number.

3975657 is a deficient number, since it is larger than the sum of its proper divisors (2315991).

3975657 is a wasteful number, since it uses less digits than its factorization.

3975657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269 (or 238 counting only the distinct ones).

The product of its digits is 198450, while the sum is 42.

The square root of 3975657 is about 1993.9049626299. The cubic root of 3975657 is about 158.4174322081.

The spelling of 3975657 in words is "three million, nine hundred seventy-five thousand, six hundred fifty-seven".