12520045252 has 72 divisors (see below), whose sum is σ = 26070297120. Its totient is φ = 5214942720.

The previous prime is 12520045217. The next prime is 12520045253. The reversal of 12520045252 is 25254002521.

It is a super-2 number, since 2×12520045252² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12520045252.

It is not an unprimeable number, because it can be changed into a prime (12520045253) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1027548 + ... + 1039660.

It is an arithmetic number, because the mean of its divisors is an integer number (362087460).

Almost surely, 2^12520045252 is an apocalyptic number.

It is an amenable number.

12520045252 is an abundant number, since it is smaller than the sum of its proper divisors (13550251868).

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

12520045252 is a wasteful number, since it uses less digits than its factorization.

12520045252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12293 (or 12278 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 28.

Adding to 12520045252 its reverse (25254002521), we get a palindrome (37774047773).

The spelling of 12520045252 in words is "twelve billion, five hundred twenty million, forty-five thousand, two hundred fifty-two".