12538457 has 4 divisors (see below), whose sum is σ = 12571920. Its totient is φ = 12504996.

The previous prime is 12538453. The next prime is 12538481. The reversal of 12538457 is 75483521.

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 12538457 - 2² = 12538453 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12538453) 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, 16163 + ... + 16920.

It is an arithmetic number, because the mean of its divisors is an integer number (3142980).

Almost surely, 2^12538457 is an apocalyptic number.

It is an amenable number.

12538457 is a deficient number, since it is larger than the sum of its proper divisors (33463).

12538457 is an equidigital number, since it uses as much as digits as its factorization.

12538457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33462.

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

The square root of 12538457 is about 3540.9683703755. The cubic root of 12538457 is about 232.3172001301.

The spelling of 12538457 in words is "twelve million, five hundred thirty-eight thousand, four hundred fifty-seven".