12911085 has 24 divisors (see below), whose sum is σ = 24414624. Its totient is φ = 6259680.

The previous prime is 12911081. The next prime is 12911099. The reversal of 12911085 is 58011921.

It is not a de Polignac number, because 12911085 - 2² = 12911081 is a prime.

It is a super-2 number, since 2×12911085² = 333392231754450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12911081) 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, 12547 + ... + 13536.

It is an arithmetic number, because the mean of its divisors is an integer number (1017276).

Almost surely, 2^12911085 is an apocalyptic number.

12911085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12911085 is a deficient number, since it is larger than the sum of its proper divisors (11503539).

12911085 is a wasteful number, since it uses less digits than its factorization.

12911085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26105 (or 26102 counting only the distinct ones).

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

The square root of 12911085 is about 3593.1998274518. The cubic root of 12911085 is about 234.5961677629.

The spelling of 12911085 in words is "twelve million, nine hundred eleven thousand, eighty-five".