12918055 has 4 divisors (see below), whose sum is σ = 15501672. Its totient is φ = 10334440.

The previous prime is 12918049. The next prime is 12918089. The reversal of 12918055 is 55081921.

12918055 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55081921 = 17 ⋅3240113.

It is not a de Polignac number, because 12918055 - 2⁵ = 12918023 is a prime.

It is a super-2 number, since 2×12918055² = 333752289966050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1291801 + ... + 1291810.

It is an arithmetic number, because the mean of its divisors is an integer number (3875418).

Almost surely, 2^12918055 is an apocalyptic number.

12918055 is a deficient number, since it is larger than the sum of its proper divisors (2583617).

12918055 is an equidigital number, since it uses as much as digits as its factorization.

12918055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2583616.

The product of its (nonzero) digits is 3600, while the sum is 31.

The square root of 12918055 is about 3594.1695842016. The cubic root of 12918055 is about 234.6383754508.

Adding to 12918055 its reverse (55081921), we get a palindrome (67999976).

The spelling of 12918055 in words is "twelve million, nine hundred eighteen thousand, fifty-five".