11887641 has 40 divisors (see below), whose sum is σ = 19209960. Its totient is φ = 7299072.

The previous prime is 11887637. The next prime is 11887643. The reversal of 11887641 is 14678811.

11887641 is a `hidden beast` number, since 1 + 1 + 8 + 8 + 7 + 641 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1390041 + 10497600 = 1179^2 + 3240^2 .

It is not a de Polignac number, because 11887641 - 2² = 11887637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11887596 and 11887605.

It is not an unprimeable number, because it can be changed into a prime (11887643) 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 39 ways as a sum of consecutive naturals, for example, 122505 + ... + 122601.

It is an arithmetic number, because the mean of its divisors is an integer number (480249).

Almost surely, 2^11887641 is an apocalyptic number.

It is an amenable number.

11887641 is a deficient number, since it is larger than the sum of its proper divisors (7322319).

11887641 is an equidigital number, since it uses as much as digits as its factorization.

11887641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215 (or 206 counting only the distinct ones).

The product of its digits is 10752, while the sum is 36.

The square root of 11887641 is about 3447.8458492224. The cubic root of 11887641 is about 228.2260569589.

The spelling of 11887641 in words is "eleven million, eight hundred eighty-seven thousand, six hundred forty-one".