12867855 has 64 divisors (see below), whose sum is σ = 27675648. Its totient is φ = 4930560.

The previous prime is 12867853. The next prime is 12867857. The reversal of 12867855 is 55876821.

It is an interprime number because it is at equal distance from previous prime (12867853) and next prime (12867857).

It is not a de Polignac number, because 12867855 - 2¹ = 12867853 is a prime.

Its product of digits (134400) is a multiple of the sum of its prime divisors (896).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12867853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14587 + ... + 15443.

It is an arithmetic number, because the mean of its divisors is an integer number (432432).

Almost surely, 2^12867855 is an apocalyptic number.

12867855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12867855 is an abundant number, since it is smaller than the sum of its proper divisors (14807793).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12867855 is a wasteful number, since it uses less digits than its factorization.

12867855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 896.

The product of its digits is 134400, while the sum is 42.

The square root of 12867855 is about 3587.1792539543. The cubic root of 12867855 is about 234.3340433322.

The spelling of 12867855 in words is "twelve million, eight hundred sixty-seven thousand, eight hundred fifty-five".