12585557 has 2 divisors, whose sum is σ = 12585558. Its totient is φ = 12585556.

The previous prime is 12585553. The next prime is 12585571. The reversal of 12585557 is 75558521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12432676 + 152881 = 3526^2 + 391^2 .

It is an emirp because it is prime and its reverse (75558521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12585557 - 2² = 12585553 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12585557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12585553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6292778 + 6292779.

It is an arithmetic number, because the mean of its divisors is an integer number (6292779).

Almost surely, 2^12585557 is an apocalyptic number.

It is an amenable number.

12585557 is a deficient number, since it is larger than the sum of its proper divisors (1).

12585557 is an equidigital number, since it uses as much as digits as its factorization.

12585557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70000, while the sum is 38.

The square root of 12585557 is about 3547.6128593746. The cubic root of 12585557 is about 232.6077320903.

The spelling of 12585557 in words is "twelve million, five hundred eighty-five thousand, five hundred fifty-seven".