11820565 has 8 divisors (see below), whose sum is σ = 14931360. Its totient is φ = 8958672.

The previous prime is 11820563. The next prime is 11820581. The reversal of 11820565 is 56502811.

11820565 is digitally balanced in base 2, 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 11820565 - 2¹ = 11820563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11820563) 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, 62119 + ... + 62308.

It is an arithmetic number, because the mean of its divisors is an integer number (1866420).

Almost surely, 2^11820565 is an apocalyptic number.

It is an amenable number.

11820565 is a deficient number, since it is larger than the sum of its proper divisors (3110795).

11820565 is a wasteful number, since it uses less digits than its factorization.

11820565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124451.

The product of its (nonzero) digits is 2400, while the sum is 28.

The square root of 11820565 is about 3438.1048558763. The cubic root of 11820565 is about 227.7959919777.

The spelling of 11820565 in words is "eleven million, eight hundred twenty thousand, five hundred sixty-five".