11871656 has 32 divisors (see below), whose sum is σ = 23738400. Its totient is φ = 5549760.

The previous prime is 11871653. The next prime is 11871659. The reversal of 11871656 is 65617811.

It is an interprime number because it is at equal distance from previous prime (11871653) and next prime (11871659).

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12146 + ... + 13086.

It is an arithmetic number, because the mean of its divisors is an integer number (741825).

Almost surely, 2^11871656 is an apocalyptic number.

It is an amenable number.

11871656 is a deficient number, since it is larger than the sum of its proper divisors (11866744).

11871656 is a wasteful number, since it uses less digits than its factorization.

11871656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1049 (or 1045 counting only the distinct ones).

The product of its digits is 10080, while the sum is 35.

The square root of 11871656 is about 3445.5269553437. The cubic root of 11871656 is about 228.1237145358.

The spelling of 11871656 in words is "eleven million, eight hundred seventy-one thousand, six hundred fifty-six".