12879842 has 4 divisors (see below), whose sum is σ = 19319766. Its totient is φ = 6439920.

The previous prime is 12879827. The next prime is 12879851. The reversal of 12879842 is 24897821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11689561 + 1190281 = 3419^2 + 1091^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12879842.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3219959 + ... + 3219962.

Almost surely, 2^12879842 is an apocalyptic number.

12879842 is a deficient number, since it is larger than the sum of its proper divisors (6439924).

12879842 is an equidigital number, since it uses as much as digits as its factorization.

12879842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6439923.

The product of its digits is 64512, while the sum is 41.

The square root of 12879842 is about 3588.8496764284. The cubic root of 12879842 is about 234.4067850700.

The spelling of 12879842 in words is "twelve million, eight hundred seventy-nine thousand, eight hundred forty-two".