11560821 has 16 divisors (see below), whose sum is σ = 16148160. Its totient is φ = 7347200.

The previous prime is 11560819. The next prime is 11560831. The reversal of 11560821 is 12806511.

It is a cyclic number.

It is not a de Polignac number, because 11560821 - 2¹ = 11560819 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11560791 and 11560800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11560831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6421 + ... + 8021.

It is an arithmetic number, because the mean of its divisors is an integer number (1009260).

Almost surely, 2^11560821 is an apocalyptic number.

It is an amenable number.

11560821 is a deficient number, since it is larger than the sum of its proper divisors (4587339).

11560821 is a wasteful number, since it uses less digits than its factorization.

11560821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1716.

The product of its (nonzero) digits is 480, while the sum is 24.

The square root of 11560821 is about 3400.1207331505. The cubic root of 11560821 is about 226.1150965676.

The spelling of 11560821 in words is "eleven million, five hundred sixty thousand, eight hundred twenty-one".