12120642 has 24 divisors (see below), whose sum is σ = 26822016. Its totient is φ = 3953976.

The previous prime is 12120631. The next prime is 12120649. The reversal of 12120642 is 24602121.

12120642 is a `hidden beast` number, since 1 + 2 + 1 + 20 + 642 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (12120649) 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 11 ways as a sum of consecutive naturals, for example, 6318 + ... + 8009.

It is an arithmetic number, because the mean of its divisors is an integer number (1117584).

Almost surely, 2^12120642 is an apocalyptic number.

12120642 is an abundant number, since it is smaller than the sum of its proper divisors (14701374).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12120642 is a wasteful number, since it uses less digits than its factorization.

12120642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14382 (or 14379 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 12120642 is about 3481.4712407257. The cubic root of 12120642 is about 229.7075173169.

Adding to 12120642 its reverse (24602121), we get a palindrome (36722763).

The spelling of 12120642 in words is "twelve million, one hundred twenty thousand, six hundred forty-two".