12689942 has 8 divisors (see below), whose sum is σ = 19068096. Its totient is φ = 6333912.

The previous prime is 12689923. The next prime is 12689969. The reversal of 12689942 is 24998621.

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

It is a super-2 number, since 2×12689942² = 322069255926728, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12689942.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4013 + ... + 6440.

It is an arithmetic number, because the mean of its divisors is an integer number (2383512).

Almost surely, 2^12689942 is an apocalyptic number.

12689942 is a deficient number, since it is larger than the sum of its proper divisors (6378154).

12689942 is a wasteful number, since it uses less digits than its factorization.

12689942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11062.

The product of its digits is 62208, while the sum is 41.

The square root of 12689942 is about 3562.2944853002. The cubic root of 12689942 is about 233.2490475621.

It can be divided in two parts, 12689 and 942, that added together give a palindrome (13631).

The spelling of 12689942 in words is "twelve million, six hundred eighty-nine thousand, nine hundred forty-two".