12870528725 has 12 divisors (see below), whose sum is σ = 16898247684. Its totient is φ = 9690750720.

The previous prime is 12870528721. The next prime is 12870528751. The reversal of 12870528725 is 52782507821.

It can be written as a sum of positive squares in 6 ways, for example, as 1043096209 + 11827432516 = 32297^2 + 108754^2 .

It is not a de Polignac number, because 12870528725 - 2² = 12870528721 is a prime.

It is a super-2 number, since 2×12870528725² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12870528725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12870528721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15141374 + ... + 15142223.

It is an arithmetic number, because the mean of its divisors is an integer number (1408187307).

Almost surely, 2^12870528725 is an apocalyptic number.

It is an amenable number.

12870528725 is a deficient number, since it is larger than the sum of its proper divisors (4027718959).

12870528725 is a wasteful number, since it uses less digits than its factorization.

12870528725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30283624 (or 30283619 counting only the distinct ones).

The product of its (nonzero) digits is 627200, while the sum is 47.

The spelling of 12870528725 in words is "twelve billion, eight hundred seventy million, five hundred twenty-eight thousand, seven hundred twenty-five".