12591108 has 18 divisors (see below), whose sum is σ = 31827614. Its totient is φ = 4197024.

The previous prime is 12591043. The next prime is 12591149. The reversal of 12591108 is 80119521.

It can be written as a sum of positive squares in only one way, i.e., 12404484 + 186624 = 3522^2 + 432^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 174841 + ... + 174912.

Almost surely, 2^12591108 is an apocalyptic number.

12591108 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12591108 is an abundant number, since it is smaller than the sum of its proper divisors (19236506).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12591108 is a wasteful number, since it uses less digits than its factorization.

12591108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349763 (or 349758 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 27.

The square root of 12591108 is about 3548.3951301962. The cubic root of 12591108 is about 232.6419251402.

The spelling of 12591108 in words is "twelve million, five hundred ninety-one thousand, one hundred eight".