11785681 has 8 divisors (see below), whose sum is σ = 12446720. Its totient is φ = 11128752.

The previous prime is 11785667. The next prime is 11785693. The reversal of 11785681 is 18658711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11785681 - 2⁵ = 11785649 is a prime.

It is a super-2 number, since 2×11785681² = 277804553267522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11785681.

It is not an unprimeable number, because it can be changed into a prime (11785601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6256 + ... + 7918.

It is an arithmetic number, because the mean of its divisors is an integer number (1555840).

Almost surely, 2^11785681 is an apocalyptic number.

It is an amenable number.

11785681 is a deficient number, since it is larger than the sum of its proper divisors (661039).

11785681 is a wasteful number, since it uses less digits than its factorization.

11785681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2055.

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

The square root of 11785681 is about 3433.0279637661. The cubic root of 11785681 is about 227.5716861399.

It can be divided in two parts, 1178 and 5681, that added together give a cube (6859 = 19³).

The spelling of 11785681 in words is "eleven million, seven hundred eighty-five thousand, six hundred eighty-one".