12856442 has 8 divisors (see below), whose sum is σ = 19412832. Its totient is φ = 6385500.

The previous prime is 12856423. The next prime is 12856447. The reversal of 12856442 is 24465821.

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

It is a junction number, because it is equal to n+sod(n) for n = 12856399 and 12856408.

It is not an unprimeable number, because it can be changed into a prime (12856447) 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 3 ways as a sum of consecutive naturals, for example, 20984 + ... + 21587.

It is an arithmetic number, because the mean of its divisors is an integer number (2426604).

Almost surely, 2^12856442 is an apocalyptic number.

12856442 is a deficient number, since it is larger than the sum of its proper divisors (6556390).

12856442 is a wasteful number, since it uses less digits than its factorization.

12856442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42724.

The product of its digits is 15360, while the sum is 32.

The square root of 12856442 is about 3585.5880968120. The cubic root of 12856442 is about 234.2647428539.

The spelling of 12856442 in words is "twelve million, eight hundred fifty-six thousand, four hundred forty-two".