12689842 has 16 divisors (see below), whose sum is σ = 20974464. Its totient is φ = 5710000.

The previous prime is 12689821. The next prime is 12689857. The reversal of 12689842 is 24898621.

It is a super-2 number, since 2×12689842² = 322064179969928, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12689795 and 12689804.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 634 + ... + 5077.

It is an arithmetic number, because the mean of its divisors is an integer number (1310904).

Almost surely, 2^12689842 is an apocalyptic number.

12689842 is a deficient number, since it is larger than the sum of its proper divisors (8284622).

12689842 is a wasteful number, since it uses less digits than its factorization.

12689842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5825.

The product of its digits is 55296, while the sum is 40.

The square root of 12689842 is about 3562.2804493751. The cubic root of 12689842 is about 233.2484348730.

It can be divided in two parts, 12689 and 842, that added together give a palindrome (13531).

The spelling of 12689842 in words is "twelve million, six hundred eighty-nine thousand, eight hundred forty-two".