12775839 has 8 divisors (see below), whose sum is σ = 17116032. Its totient is φ = 8476440.

The previous prime is 12775831. The next prime is 12775849. The reversal of 12775839 is 93857721.

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

It is not a de Polignac number, because 12775839 - 2³ = 12775831 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12775839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12775831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9459 + ... + 10724.

It is an arithmetic number, because the mean of its divisors is an integer number (2139504).

Almost surely, 2^12775839 is an apocalyptic number.

12775839 is a deficient number, since it is larger than the sum of its proper divisors (4340193).

12775839 is a wasteful number, since it uses less digits than its factorization.

12775839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20397.

The product of its digits is 105840, while the sum is 42.

The square root of 12775839 is about 3574.3305666936. The cubic root of 12775839 is about 233.7741447030.

The spelling of 12775839 in words is "twelve million, seven hundred seventy-five thousand, eight hundred thirty-nine".