12122564 has 36 divisors (see below), whose sum is σ = 23551164. Its totient is φ = 5440512.

The previous prime is 12122563. The next prime is 12122597. The reversal of 12122564 is 46522121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6400900 + 5721664 = 2530^2 + 2392^2 .

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (12122563) 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 11 ways as a sum of consecutive naturals, for example, 35804 + ... + 36140.

It is an arithmetic number, because the mean of its divisors is an integer number (654199).

Almost surely, 2^12122564 is an apocalyptic number.

It is an amenable number.

12122564 is a deficient number, since it is larger than the sum of its proper divisors (11428600).

12122564 is a wasteful number, since it uses less digits than its factorization.

12122564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404 (or 379 counting only the distinct ones).

The product of its digits is 960, while the sum is 23.

The square root of 12122564 is about 3481.7472625106. The cubic root of 12122564 is about 229.7196584371.

Adding to 12122564 its reverse (46522121), we get a palindrome (58644685).

The spelling of 12122564 in words is "twelve million, one hundred twenty-two thousand, five hundred sixty-four".