12641559 has 24 divisors (see below), whose sum is σ = 20465280. Its totient is φ = 6907824.

The previous prime is 12641549. The next prime is 12641561. The reversal of 12641559 is 95514621.

It is not a de Polignac number, because 12641559 - 2¹³ = 12633367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12641509) 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 23 ways as a sum of consecutive naturals, for example, 1512 + ... + 5250.

It is an arithmetic number, because the mean of its divisors is an integer number (852720).

Almost surely, 2^12641559 is an apocalyptic number.

12641559 is a deficient number, since it is larger than the sum of its proper divisors (7823721).

12641559 is a wasteful number, since it uses less digits than its factorization.

12641559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3779 (or 3772 counting only the distinct ones).

The product of its digits is 10800, while the sum is 33.

The square root of 12641559 is about 3555.4970116708. The cubic root of 12641559 is about 232.9522334496.

The spelling of 12641559 in words is "twelve million, six hundred forty-one thousand, five hundred fifty-nine".