12591055 has 4 divisors (see below), whose sum is σ = 15109272. Its totient is φ = 10072840.

The previous prime is 12591043. The next prime is 12591149. The reversal of 12591055 is 55019521.

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

It is not a de Polignac number, because 12591055 - 2⁵ = 12591023 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

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, 1259101 + ... + 1259110.

It is an arithmetic number, because the mean of its divisors is an integer number (3777318).

Almost surely, 2^12591055 is an apocalyptic number.

12591055 is a deficient number, since it is larger than the sum of its proper divisors (2518217).

12591055 is an equidigital number, since it uses as much as digits as its factorization.

12591055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2518216.

The product of its (nonzero) digits is 2250, while the sum is 28.

The square root of 12591055 is about 3548.3876620234. The cubic root of 12591055 is about 232.6415987183.

The spelling of 12591055 in words is "twelve million, five hundred ninety-one thousand, fifty-five".