12544991 has 4 divisors (see below), whose sum is σ = 12558000. Its totient is φ = 12531984.

The previous prime is 12544981. The next prime is 12544999. The reversal of 12544991 is 19944521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12544991 - 2⁶ = 12544927 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 (12544999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4931 + ... + 7028.

It is an arithmetic number, because the mean of its divisors is an integer number (3139500).

Almost surely, 2^12544991 is an apocalyptic number.

12544991 is a deficient number, since it is larger than the sum of its proper divisors (13009).

12544991 is a wasteful number, since it uses less digits than its factorization.

12544991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13008.

The product of its digits is 12960, while the sum is 35.

The square root of 12544991 is about 3541.8908791774. The cubic root of 12544991 is about 232.3575479172.

The spelling of 12544991 in words is "twelve million, five hundred forty-four thousand, nine hundred ninety-one".