12561685 has 8 divisors (see below), whose sum is σ = 15481656. Its totient is φ = 9777600.

The previous prime is 12561671. The next prime is 12561701. The reversal of 12561685 is 58616521.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4844401 + 7717284 = 2201^2 + 2778^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12561685 - 2¹¹ = 12559637 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12561685.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33766 + ... + 34135.

It is an arithmetic number, because the mean of its divisors is an integer number (1935207).

Almost surely, 2^12561685 is an apocalyptic number.

It is an amenable number.

12561685 is a deficient number, since it is larger than the sum of its proper divisors (2919971).

12561685 is an equidigital number, since it uses as much as digits as its factorization.

12561685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67943.

The product of its digits is 14400, while the sum is 34.

The square root of 12561685 is about 3544.2467464893. The cubic root of 12561685 is about 232.4605706443.

The spelling of 12561685 in words is "twelve million, five hundred sixty-one thousand, six hundred eighty-five".