11561684 has 6 divisors (see below), whose sum is σ = 20232954. Its totient is φ = 5780840.

The previous prime is 11561681. The next prime is 11561687. The reversal of 11561684 is 48616511.

It is an interprime number because it is at equal distance from previous prime (11561681) and next prime (11561687).

It can be written as a sum of positive squares in only one way, i.e., 7672900 + 3888784 = 2770^2 + 1972^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 11561684.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11561681) 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 as a sum of consecutive naturals, namely, 1445207 + ... + 1445214.

It is an arithmetic number, because the mean of its divisors is an integer number (3372159).

Almost surely, 2^11561684 is an apocalyptic number.

It is an amenable number.

11561684 is a deficient number, since it is larger than the sum of its proper divisors (8671270).

11561684 is a wasteful number, since it uses less digits than its factorization.

11561684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2890425 (or 2890423 counting only the distinct ones).

The product of its digits is 5760, while the sum is 32.

The square root of 11561684 is about 3400.2476380405. The cubic root of 11561684 is about 226.1207228253.

The spelling of 11561684 in words is "eleven million, five hundred sixty-one thousand, six hundred eighty-four".