12655709 has 4 divisors (see below), whose sum is σ = 13806240. Its totient is φ = 11505180.

The previous prime is 12655703. The next prime is 12655733. The reversal of 12655709 is 90755621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12655709 - 2⁴ = 12655693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12655703) by changing a digit.

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, 575249 + ... + 575270.

It is an arithmetic number, because the mean of its divisors is an integer number (3451560).

Almost surely, 2^12655709 is an apocalyptic number.

It is an amenable number.

12655709 is a deficient number, since it is larger than the sum of its proper divisors (1150531).

12655709 is a wasteful number, since it uses less digits than its factorization.

12655709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1150530.

The product of its (nonzero) digits is 18900, while the sum is 35.

The square root of 12655709 is about 3557.4863316673. The cubic root of 12655709 is about 233.0391173801.

The spelling of 12655709 in words is "twelve million, six hundred fifty-five thousand, seven hundred nine".