12512789 has 8 divisors (see below), whose sum is σ = 12715320. Its totient is φ = 12312000.

The previous prime is 12512783. The next prime is 12512807. The reversal of 12512789 is 98721521.

It can be written as a sum of positive squares in 4 ways, for example, as 7606564 + 4906225 = 2758^2 + 2215^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12512789 - 2²⁰ = 11464213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12512783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22859 + ... + 23399.

It is an arithmetic number, because the mean of its divisors is an integer number (1589415).

Almost surely, 2^12512789 is an apocalyptic number.

It is an amenable number.

12512789 is a deficient number, since it is larger than the sum of its proper divisors (202531).

12512789 is a wasteful number, since it uses less digits than its factorization.

12512789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 871.

The product of its digits is 10080, while the sum is 35.

The square root of 12512789 is about 3537.3420812808. The cubic root of 12512789 is about 232.1585630760.

The spelling of 12512789 in words is "twelve million, five hundred twelve thousand, seven hundred eighty-nine".