12540125532 has 48 divisors (see below), whose sum is σ = 31969873152. Its totient is φ = 3794138880.

The previous prime is 12540125513. The next prime is 12540125597. The reversal of 12540125532 is 23552104521.

It is a self number, because there is not a number n which added to its sum of digits gives 12540125532.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11988 + ... + 158820.

It is an arithmetic number, because the mean of its divisors is an integer number (666039024).

Almost surely, 2^12540125532 is an apocalyptic number.

12540125532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12540125532 is an abundant number, since it is smaller than the sum of its proper divisors (19429747620).

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

12540125532 is a wasteful number, since it uses less digits than its factorization.

12540125532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147498 (or 147496 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The spelling of 12540125532 in words is "twelve billion, five hundred forty million, one hundred twenty-five thousand, five hundred thirty-two".