12538655 has 4 divisors (see below), whose sum is σ = 15046392. Its totient is φ = 10030920.

The previous prime is 12538649. The next prime is 12538679. The reversal of 12538655 is 55683521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55683521 = 337 ⋅165233.

It is not a de Polignac number, because 12538655 - 2⁸ = 12538399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1253861 + ... + 1253870.

It is an arithmetic number, because the mean of its divisors is an integer number (3761598).

Almost surely, 2^12538655 is an apocalyptic number.

12538655 is a deficient number, since it is larger than the sum of its proper divisors (2507737).

12538655 is an equidigital number, since it uses as much as digits as its factorization.

12538655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2507736.

The product of its digits is 36000, while the sum is 35.

The square root of 12538655 is about 3540.9963287188. The cubic root of 12538655 is about 232.3184229962.

The spelling of 12538655 in words is "twelve million, five hundred thirty-eight thousand, six hundred fifty-five".