12875309 has 4 divisors (see below), whose sum is σ = 13000416. Its totient is φ = 12750204.

The previous prime is 12875287. The next prime is 12875327. The reversal of 12875309 is 90357821.

12875309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90357821 = 6571 ⋅13751.

It is a cyclic number.

It is not a de Polignac number, because 12875309 - 2²⁰ = 11826733 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12875339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62399 + ... + 62604.

It is an arithmetic number, because the mean of its divisors is an integer number (3250104).

Almost surely, 2^12875309 is an apocalyptic number.

It is an amenable number.

12875309 is a deficient number, since it is larger than the sum of its proper divisors (125107).

12875309 is a wasteful number, since it uses less digits than its factorization.

12875309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125106.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 12875309 is about 3588.2180814438. The cubic root of 12875309 is about 234.3792823869.

The spelling of 12875309 in words is "twelve million, eight hundred seventy-five thousand, three hundred nine".