12538879 has 4 divisors (see below), whose sum is σ = 13198840. Its totient is φ = 11878920.

The previous prime is 12538873. The next prime is 12538891. The reversal of 12538879 is 97883521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12538879 - 2²¹ = 10441727 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 (12538873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 329952 + ... + 329989.

It is an arithmetic number, because the mean of its divisors is an integer number (3299710).

Almost surely, 2^12538879 is an apocalyptic number.

12538879 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

12538879 is a deficient number, since it is larger than the sum of its proper divisors (659961).

12538879 is an equidigital number, since it uses as much as digits as its factorization.

12538879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659960.

The product of its digits is 120960, while the sum is 43.

The square root of 12538879 is about 3541.0279580935. The cubic root of 12538879 is about 232.3198064252.

The spelling of 12538879 in words is "twelve million, five hundred thirty-eight thousand, eight hundred seventy-nine".