12956089 has 4 divisors (see below), whose sum is σ = 12963456. Its totient is φ = 12948724.

The previous prime is 12956087. The next prime is 12956093. The reversal of 12956089 is 98065921.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12956089 - 2¹ = 12956087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12956087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 672 + ... + 5134.

It is an arithmetic number, because the mean of its divisors is an integer number (3240864).

Almost surely, 2^12956089 is an apocalyptic number.

It is an amenable number.

12956089 is a deficient number, since it is larger than the sum of its proper divisors (7367).

12956089 is an equidigital number, since it uses as much as digits as its factorization.

12956089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7366.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 12956089 is about 3599.4567645688. The cubic root of 12956089 is about 234.8684279335.

The spelling of 12956089 in words is "twelve million, nine hundred fifty-six thousand, eighty-nine".