12781934 has 8 divisors (see below), whose sum is σ = 20915928. Its totient is φ = 5809960.

The previous prime is 12781931. The next prime is 12781939. The reversal of 12781934 is 43918721.

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 = 12781894 and 12781903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12781931) 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, 290477 + ... + 290520.

It is an arithmetic number, because the mean of its divisors is an integer number (2614491).

Almost surely, 2^12781934 is an apocalyptic number.

12781934 is a deficient number, since it is larger than the sum of its proper divisors (8133994).

12781934 is a wasteful number, since it uses less digits than its factorization.

12781934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581010.

The product of its digits is 12096, while the sum is 35.

The square root of 12781934 is about 3575.1830722356. The cubic root of 12781934 is about 233.8113145224.

The spelling of 12781934 in words is "twelve million, seven hundred eighty-one thousand, nine hundred thirty-four".