12597557 has 6 divisors (see below), whose sum is σ = 14654358. Its totient is φ = 10797864.

The previous prime is 12597553. The next prime is 12597643. The reversal of 12597557 is 75579521.

12597557 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 8561476 + 4036081 = 2926^2 + 2009^2 .

It is not a de Polignac number, because 12597557 - 2² = 12597553 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 (12597553) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 128498 + ... + 128595.

It is an arithmetic number, because the mean of its divisors is an integer number (2442393).

Almost surely, 2^12597557 is an apocalyptic number.

It is an amenable number.

12597557 is a deficient number, since it is larger than the sum of its proper divisors (2056801).

12597557 is an equidigital number, since it uses as much as digits as its factorization.

12597557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257107 (or 257100 counting only the distinct ones).

The product of its digits is 110250, while the sum is 41.

The square root of 12597557 is about 3549.3037345372. The cubic root of 12597557 is about 232.6816370729.

The spelling of 12597557 in words is "twelve million, five hundred ninety-seven thousand, five hundred fifty-seven".