12438557 has 4 divisors (see below), whose sum is σ = 12649440. Its totient is φ = 12227676.

The previous prime is 12438553. The next prime is 12438599. The reversal of 12438557 is 75583421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12438557 - 2² = 12438553 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 (12438553) 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, 105353 + ... + 105470.

It is an arithmetic number, because the mean of its divisors is an integer number (3162360).

Almost surely, 2^12438557 is an apocalyptic number.

It is an amenable number.

12438557 is a deficient number, since it is larger than the sum of its proper divisors (210883).

12438557 is an equidigital number, since it uses as much as digits as its factorization.

12438557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210882.

The product of its digits is 33600, while the sum is 35.

The square root of 12438557 is about 3526.8338492194. The cubic root of 12438557 is about 231.6985594057.

The spelling of 12438557 in words is "twelve million, four hundred thirty-eight thousand, five hundred fifty-seven".