12918655 has 8 divisors (see below), whose sum is σ = 15832512. Its totient is φ = 10114848.

The previous prime is 12918637. The next prime is 12918671. The reversal of 12918655 is 55681921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12918655 - 2¹⁹ = 12394367 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 27252 + ... + 27721.

It is an arithmetic number, because the mean of its divisors is an integer number (1979064).

Almost surely, 2^12918655 is an apocalyptic number.

12918655 is a deficient number, since it is larger than the sum of its proper divisors (2913857).

12918655 is an equidigital number, since it uses as much as digits as its factorization.

12918655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55025.

The product of its digits is 21600, while the sum is 37.

The square root of 12918655 is about 3594.2530517480. The cubic root of 12918655 is about 234.6420081144.

It can be divided in two parts, 12 and 918655, that multiplied together give a triangular number (11023860 = T₄₆₉₅).

The spelling of 12918655 in words is "twelve million, nine hundred eighteen thousand, six hundred fifty-five".