11871657 has 32 divisors (see below), whose sum is σ = 20981760. Its totient is φ = 6486480.

The previous prime is 11871653. The next prime is 11871659. The reversal of 11871657 is 75617811.

It is a happy number.

11871657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11871657 - 2² = 11871653 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11871653) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2982 + ... + 5712.

It is an arithmetic number, because the mean of its divisors is an integer number (655680).

Almost surely, 2^11871657 is an apocalyptic number.

It is an amenable number.

11871657 is a deficient number, since it is larger than the sum of its proper divisors (9110103).

11871657 is a wasteful number, since it uses less digits than its factorization.

11871657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2770 (or 2764 counting only the distinct ones).

The product of its digits is 11760, while the sum is 36.

The square root of 11871657 is about 3445.5271004594. The cubic root of 11871657 is about 228.1237209411.

The spelling of 11871657 in words is "eleven million, eight hundred seventy-one thousand, six hundred fifty-seven".