11871685 has 16 divisors (see below), whose sum is σ = 16560000. Its totient is φ = 8001216.

The previous prime is 11871659. The next prime is 11871689. The reversal of 11871685 is 58617811.

11871685 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 11871685 - 2⁵ = 11871653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11871689) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 810 + ... + 4939.

It is an arithmetic number, because the mean of its divisors is an integer number (1035000).

Almost surely, 2^11871685 is an apocalyptic number.

It is an amenable number.

11871685 is a deficient number, since it is larger than the sum of its proper divisors (4688315).

11871685 is an equidigital number, since it uses as much as digits as its factorization.

11871685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5820.

The product of its digits is 13440, while the sum is 37.

The square root of 11871685 is about 3445.5311636960. The cubic root of 11871685 is about 228.1239002887.

The spelling of 11871685 in words is "eleven million, eight hundred seventy-one thousand, six hundred eighty-five".