11587681 has 8 divisors (see below), whose sum is σ = 13365440. Its totient is φ = 9840528.

The previous prime is 11587673. The next prime is 11587687. The reversal of 11587681 is 18678511.

11587681 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 11587681 - 2³ = 11587673 is a prime.

It is a super-2 number, since 2×11587681² = 268548701915522, 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 11587681.

It is not an unprimeable number, because it can be changed into a prime (11587687) 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, 6831 + ... + 8356.

It is an arithmetic number, because the mean of its divisors is an integer number (1670680).

Almost surely, 2^11587681 is an apocalyptic number.

It is an amenable number.

11587681 is a deficient number, since it is larger than the sum of its proper divisors (1777759).

11587681 is a wasteful number, since it uses less digits than its factorization.

11587681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15303.

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

The square root of 11587681 is about 3404.0683013124. The cubic root of 11587681 is about 226.2900770453.

The spelling of 11587681 in words is "eleven million, five hundred eighty-seven thousand, six hundred eighty-one".