12645907 has 4 divisors (see below), whose sum is σ = 12771216. Its totient is φ = 12520600.

The previous prime is 12645901. The next prime is 12645911. The reversal of 12645907 is 70954621.

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

It is a cyclic number.

It is not a de Polignac number, because 12645907 - 2¹⁹ = 12121619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12645901) 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, 62503 + ... + 62704.

It is an arithmetic number, because the mean of its divisors is an integer number (3192804).

Almost surely, 2^12645907 is an apocalyptic number.

12645907 is a deficient number, since it is larger than the sum of its proper divisors (125309).

12645907 is a wasteful number, since it uses less digits than its factorization.

12645907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125308.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 12645907 is about 3556.1084066715. The cubic root of 12645907 is about 232.9789379673.

The spelling of 12645907 in words is "twelve million, six hundred forty-five thousand, nine hundred seven".