12618655 has 16 divisors (see below), whose sum is σ = 17372160. Its totient is φ = 8619552.

The previous prime is 12618653. The next prime is 12618667. The reversal of 12618655 is 55681621.

It is a happy number.

12618655 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12618655 - 2¹ = 12618653 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12618655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12618653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11626 + ... + 12664.

It is an arithmetic number, because the mean of its divisors is an integer number (1085760).

Almost surely, 2^12618655 is an apocalyptic number.

12618655 is a deficient number, since it is larger than the sum of its proper divisors (4753505).

12618655 is a wasteful number, since it uses less digits than its factorization.

12618655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1398.

The product of its digits is 14400, while the sum is 34.

The square root of 12618655 is about 3552.2746233927. The cubic root of 12618655 is about 232.8114606353.

It can be divided in two parts, 126 and 18655, that added together give a palindrome (18781).

The spelling of 12618655 in words is "twelve million, six hundred eighteen thousand, six hundred fifty-five".