12915055 has 4 divisors (see below), whose sum is σ = 15498072. Its totient is φ = 10332040.

The previous prime is 12915043. The next prime is 12915059. The reversal of 12915055 is 55051921.

12915055 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: 55051921 = 877 ⋅62773.

It is not a de Polignac number, because 12915055 - 2¹³ = 12906863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12915059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1291501 + ... + 1291510.

It is an arithmetic number, because the mean of its divisors is an integer number (3874518).

Almost surely, 2^12915055 is an apocalyptic number.

12915055 is a deficient number, since it is larger than the sum of its proper divisors (2583017).

12915055 is an equidigital number, since it uses as much as digits as its factorization.

12915055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2583016.

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

The square root of 12915055 is about 3593.7522173906. The cubic root of 12915055 is about 234.6202104452.

Adding to 12915055 its reverse (55051921), we get a palindrome (67966976).

The spelling of 12915055 in words is "twelve million, nine hundred fifteen thousand, fifty-five".