12855139 has 8 divisors (see below), whose sum is σ = 14054400. Its totient is φ = 11661000.

The previous prime is 12855131. The next prime is 12855187. The reversal of 12855139 is 93155821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12855139 - 2³ = 12855131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12855131) 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 7 ways as a sum of consecutive naturals, for example, 5614 + ... + 7564.

It is an arithmetic number, because the mean of its divisors is an integer number (1756800).

Almost surely, 2^12855139 is an apocalyptic number.

12855139 is a deficient number, since it is larger than the sum of its proper divisors (1199261).

12855139 is a wasteful number, since it uses less digits than its factorization.

12855139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2561.

The product of its digits is 10800, while the sum is 34.

The square root of 12855139 is about 3585.4063925865. The cubic root of 12855139 is about 234.2568283450.

The spelling of 12855139 in words is "twelve million, eight hundred fifty-five thousand, one hundred thirty-nine".