12320544 has 24 divisors (see below), whose sum is σ = 32341680. Its totient is φ = 4106816.

The previous prime is 12320507. The next prime is 12320549. The reversal of 12320544 is 44502321.

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 12320544.

It is not an unprimeable number, because it can be changed into a prime (12320549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64074 + ... + 64265.

It is an arithmetic number, because the mean of its divisors is an integer number (1347570).

Almost surely, 2^12320544 is an apocalyptic number.

It is an amenable number.

12320544 is an abundant number, since it is smaller than the sum of its proper divisors (20021136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12320544 is a wasteful number, since it uses less digits than its factorization.

12320544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128352 (or 128344 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 12320544 is about 3510.0632472934. The cubic root of 12320544 is about 230.9634694206.

Adding to 12320544 its reverse (44502321), we get a palindrome (56822865).

The spelling of 12320544 in words is "twelve million, three hundred twenty thousand, five hundred forty-four".