12585709 has 4 divisors (see below), whose sum is σ = 12630780. Its totient is φ = 12540640.

The previous prime is 12585701. The next prime is 12585731. The reversal of 12585709 is 90758521.

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 4088484 + 8497225 = 2022^2 + 2915^2 .

It is a cyclic number.

It is not a de Polignac number, because 12585709 - 2³ = 12585701 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 (12585701) 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, 22114 + ... + 22675.

It is an arithmetic number, because the mean of its divisors is an integer number (3157695).

Almost surely, 2^12585709 is an apocalyptic number.

It is an amenable number.

12585709 is a deficient number, since it is larger than the sum of its proper divisors (45071).

12585709 is an equidigital number, since it uses as much as digits as its factorization.

12585709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45070.

The product of its (nonzero) digits is 25200, while the sum is 37.

The square root of 12585709 is about 3547.6342821661. The cubic root of 12585709 is about 232.6086685138.

The spelling of 12585709 in words is "twelve million, five hundred eighty-five thousand, seven hundred nine".