3857957 has 4 divisors (see below), whose sum is σ = 3991020. Its totient is φ = 3724896.

The previous prime is 3857941. The next prime is 3857983. The reversal of 3857957 is 7597583.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7597583 = 7 ⋅1085369.

It can be written as a sum of positive squares in 2 ways, for example, as 763876 + 3094081 = 874^2 + 1759^2 .

It is a cyclic number.

It is not a de Polignac number, because 3857957 - 2⁴ = 3857941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3854957) 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 3 ways as a sum of consecutive naturals, for example, 66488 + ... + 66545.

It is an arithmetic number, because the mean of its divisors is an integer number (997755).

Almost surely, 2^3857957 is an apocalyptic number.

It is an amenable number.

3857957 is a deficient number, since it is larger than the sum of its proper divisors (133063).

3857957 is a wasteful number, since it uses less digits than its factorization.

3857957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133062.

The product of its digits is 264600, while the sum is 44.

The square root of 3857957 is about 1964.1682718138. The cubic root of 3857957 is about 156.8384208614.

The spelling of 3857957 in words is "three million, eight hundred fifty-seven thousand, nine hundred fifty-seven".