12520044 has 18 divisors (see below), whose sum is σ = 31647980. Its totient is φ = 4173336.

The previous prime is 12520043. The next prime is 12520049. The reversal of 12520044 is 44002521.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12519999 and 12520026.

It is not an unprimeable number, because it can be changed into a prime (12520043) 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 5 ways as a sum of consecutive naturals, for example, 173854 + ... + 173925.

Almost surely, 2^12520044 is an apocalyptic number.

It is an amenable number.

12520044 is an abundant number, since it is smaller than the sum of its proper divisors (19127936).

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

12520044 is a wasteful number, since it uses less digits than its factorization.

12520044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347789 (or 347784 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 12520044 is about 3538.3674201530. The cubic root of 12520044 is about 232.2034234439.

Adding to 12520044 its reverse (44002521), we get a palindrome (56522565).

The spelling of 12520044 in words is "twelve million, five hundred twenty thousand, forty-four".