12538557 has 12 divisors (see below), whose sum is σ = 18782400. Its totient is φ = 8358876.

The previous prime is 12538549. The next prime is 12538607. The reversal of 12538557 is 75583521.

It is not a de Polignac number, because 12538557 - 2³ = 12538549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12538517) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25557 + ... + 26042.

It is an arithmetic number, because the mean of its divisors is an integer number (1565200).

Almost surely, 2^12538557 is an apocalyptic number.

It is an amenable number.

12538557 is a deficient number, since it is larger than the sum of its proper divisors (6243843).

12538557 is an frugal number, since it uses more digits than its factorization.

12538557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51614 (or 51602 counting only the distinct ones).

The product of its digits is 42000, while the sum is 36.

The square root of 12538557 is about 3540.9824907785. The cubic root of 12538557 is about 232.3178177408.

The spelling of 12538557 in words is "twelve million, five hundred thirty-eight thousand, five hundred fifty-seven".