12105842 has 20 divisors (see below), whose sum is σ = 21192366. Its totient is φ = 5186160.

The previous prime is 12105829. The next prime is 12105851. The reversal of 12105842 is 24850121.

12105842 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 12103441 + 2401 = 3479^2 + 49^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3542 + ... + 6062.

Almost surely, 2^12105842 is an apocalyptic number.

12105842 is a deficient number, since it is larger than the sum of its proper divisors (9086524).

12105842 is an frugal number, since it uses more digits than its factorization.

12105842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2551 (or 2530 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 12105842 is about 3479.3450533110. The cubic root of 12105842 is about 229.6139838796.

Adding to 12105842 its reverse (24850121), we get a palindrome (36955963).

The spelling of 12105842 in words is "twelve million, one hundred five thousand, eight hundred forty-two".