12915655 has 4 divisors (see below), whose sum is σ = 15498792. Its totient is φ = 10332520.

The previous prime is 12915653. The next prime is 12915659. The reversal of 12915655 is 55651921.

12915655 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: 55651921 = 13 ⋅4280917.

It is not a de Polignac number, because 12915655 - 2¹ = 12915653 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12915655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12915653) 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, 1291561 + ... + 1291570.

It is an arithmetic number, because the mean of its divisors is an integer number (3874698).

Almost surely, 2^12915655 is an apocalyptic number.

12915655 is a deficient number, since it is larger than the sum of its proper divisors (2583137).

12915655 is an equidigital number, since it uses as much as digits as its factorization.

12915655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2583136.

The product of its digits is 13500, while the sum is 34.

The square root of 12915655 is about 3593.8356946305. The cubic root of 12915655 is about 234.6238436713.

The spelling of 12915655 in words is "twelve million, nine hundred fifteen thousand, six hundred fifty-five".