12591028 has 12 divisors (see below), whose sum is σ = 22992480. Its totient is φ = 6021752.

The previous prime is 12591023. The next prime is 12591031. The reversal of 12591028 is 82019521.

It is a junction number, because it is equal to n+sod(n) for n = 12590987 and 12591005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12591023) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 68338 + ... + 68521.

It is an arithmetic number, because the mean of its divisors is an integer number (1916040).

Almost surely, 2^12591028 is an apocalyptic number.

It is an amenable number.

12591028 is a deficient number, since it is larger than the sum of its proper divisors (10401452).

12591028 is a wasteful number, since it uses less digits than its factorization.

12591028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136886 (or 136884 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 12591028 is about 3548.3838574765. The cubic root of 12591028 is about 232.6414324276.

The spelling of 12591028 in words is "twelve million, five hundred ninety-one thousand, twenty-eight".