12655649 has 4 divisors (see below), whose sum is σ = 12748164. Its totient is φ = 12563136.

The previous prime is 12655637. The next prime is 12655651. The reversal of 12655649 is 94655621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8880400 + 3775249 = 2980^2 + 1943^2 .

It is a cyclic number.

It is not a de Polignac number, because 12655649 - 2¹⁶ = 12590113 is a prime.

It is a super-2 number, since 2×12655649² = 320330903222402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12655619) 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, 46052 + ... + 46325.

It is an arithmetic number, because the mean of its divisors is an integer number (3187041).

Almost surely, 2^12655649 is an apocalyptic number.

It is an amenable number.

12655649 is a deficient number, since it is larger than the sum of its proper divisors (92515).

12655649 is an equidigital number, since it uses as much as digits as its factorization.

12655649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92514.

The product of its digits is 64800, while the sum is 38.

The square root of 12655649 is about 3557.4778987367. The cubic root of 12655649 is about 233.0387491045.

The spelling of 12655649 in words is "twelve million, six hundred fifty-five thousand, six hundred forty-nine".