12878125 has 24 divisors (see below), whose sum is σ = 17389512. Its totient is φ = 9480000.

The previous prime is 12878123. The next prime is 12878147. The reversal of 12878125 is 52187821.

12878125 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 12 ways, for example, as 10634121 + 2244004 = 3261^2 + 1498^2 .

It is a sliding number, since 12878125 = 78125 + 12800000 and 1/78125 + 1/12800000 = 0.000012878125.

It is not a de Polignac number, because 12878125 - 2¹ = 12878123 is a prime.

It is a super-2 number, since 2×12878125² = 331692207031250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12878123) 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, 40467 + ... + 40783.

It is an arithmetic number, because the mean of its divisors is an integer number (724563).

Almost surely, 2^12878125 is an apocalyptic number.

It is an amenable number.

12878125 is a deficient number, since it is larger than the sum of its proper divisors (4511387).

12878125 is an frugal number, since it uses more digits than its factorization.

12878125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355 (or 335 counting only the distinct ones).

The product of its digits is 8960, while the sum is 34.

The square root of 12878125 is about 3588.6104553155. The cubic root of 12878125 is about 234.3963684221.

It can be divided in two parts, 128 and 78125, that multiplied together give a 7-th power (10000000 = 10⁷).

The spelling of 12878125 in words is "twelve million, eight hundred seventy-eight thousand, one hundred twenty-five".