12538855 has 24 divisors (see below), whose sum is σ = 17811360. Its totient is φ = 8447040.

The previous prime is 12538831. The next prime is 12538873. The reversal of 12538855 is 55883521.

It is not a de Polignac number, because 12538855 - 2⁹ = 12538343 is a prime.

It is a super-2 number, since 2×12538855² = 314445769422050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14526 + ... + 15364.

It is an arithmetic number, because the mean of its divisors is an integer number (742140).

Almost surely, 2^12538855 is an apocalyptic number.

12538855 is a deficient number, since it is larger than the sum of its proper divisors (5272505).

12538855 is an equidigital number, since it uses as much as digits as its factorization.

12538855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919 (or 912 counting only the distinct ones).

The product of its digits is 48000, while the sum is 37.

The square root of 12538855 is about 3541.0245692455. The cubic root of 12538855 is about 232.3196582015.

The spelling of 12538855 in words is "twelve million, five hundred thirty-eight thousand, eight hundred fifty-five".