12619655 has 4 divisors (see below), whose sum is σ = 15143592. Its totient is φ = 10095720.

The previous prime is 12619643. The next prime is 12619681. The reversal of 12619655 is 55691621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55691621 = 6469 ⋅8609.

It is not a de Polignac number, because 12619655 - 2¹⁸ = 12357511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1261961 + ... + 1261970.

It is an arithmetic number, because the mean of its divisors is an integer number (3785898).

Almost surely, 2^12619655 is an apocalyptic number.

12619655 is a deficient number, since it is larger than the sum of its proper divisors (2523937).

12619655 is an equidigital number, since it uses as much as digits as its factorization.

12619655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2523936.

The product of its digits is 16200, while the sum is 35.

The square root of 12619655 is about 3552.4153754875. The cubic root of 12619655 is about 232.8176104009.

The spelling of 12619655 in words is "twelve million, six hundred nineteen thousand, six hundred fifty-five".