11922565 has 4 divisors (see below), whose sum is σ = 14307084. Its totient is φ = 9538048.

The previous prime is 11922563. The next prime is 11922571. The reversal of 11922565 is 56522911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56522911 = 1019 ⋅55469.

It can be written as a sum of positive squares in 2 ways, for example, as 8025889 + 3896676 = 2833^2 + 1974^2 .

It is a cyclic number.

It is not a de Polignac number, because 11922565 - 2¹ = 11922563 is a prime.

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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11922563) 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 3 ways as a sum of consecutive naturals, for example, 1192252 + ... + 1192261.

It is an arithmetic number, because the mean of its divisors is an integer number (3576771).

Almost surely, 2^11922565 is an apocalyptic number.

It is an amenable number.

11922565 is a deficient number, since it is larger than the sum of its proper divisors (2384519).

11922565 is an equidigital number, since it uses as much as digits as its factorization.

11922565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2384518.

The product of its digits is 5400, while the sum is 31.

The square root of 11922565 is about 3452.9067464963. The cubic root of 11922565 is about 228.4493357436.

The spelling of 11922565 in words is "eleven million, nine hundred twenty-two thousand, five hundred sixty-five".