12873128 has 8 divisors (see below), whose sum is σ = 24137130. Its totient is φ = 6436560.

The previous prime is 12873083. The next prime is 12873149. The reversal of 12873128 is 82137821.

It can be written as a sum of positive squares in only one way, i.e., 11437924 + 1435204 = 3382^2 + 1198^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 12873094 and 12873103.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 804563 + ... + 804578.

Almost surely, 2^12873128 is an apocalyptic number.

It is an amenable number.

12873128 is a deficient number, since it is larger than the sum of its proper divisors (11264002).

12873128 is a wasteful number, since it uses less digits than its factorization.

12873128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1609147 (or 1609143 counting only the distinct ones).

The product of its digits is 5376, while the sum is 32.

The square root of 12873128 is about 3587.9141572786. The cubic root of 12873128 is about 234.3660474921.

The spelling of 12873128 in words is "twelve million, eight hundred seventy-three thousand, one hundred twenty-eight".