11527681 has 4 divisors (see below), whose sum is σ = 12575664. Its totient is φ = 10479700.

The previous prime is 11527679. The next prime is 11527693. The reversal of 11527681 is 18672511.

11527681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 11527681 - 2¹ = 11527679 is a prime.

It is a super-2 number, since 2×11527681² = 265774858475522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11527651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 523975 + ... + 523996.

It is an arithmetic number, because the mean of its divisors is an integer number (3143916).

Almost surely, 2^11527681 is an apocalyptic number.

11527681 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11527681 is a deficient number, since it is larger than the sum of its proper divisors (1047983).

11527681 is a wasteful number, since it uses less digits than its factorization.

11527681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1047982.

The product of its digits is 3360, while the sum is 31.

The square root of 11527681 is about 3395.2438793112. The cubic root of 11527681 is about 225.8988309028.

The spelling of 11527681 in words is "eleven million, five hundred twenty-seven thousand, six hundred eighty-one".