12042656 has 48 divisors (see below), whose sum is σ = 25855200. Its totient is φ = 5499648.

The previous prime is 12042619. The next prime is 12042659. The reversal of 12042656 is 65624021.

It is not an unprimeable number, because it can be changed into a prime (12042659) 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 7 ways as a sum of consecutive naturals, for example, 17291 + ... + 17973.

It is an arithmetic number, because the mean of its divisors is an integer number (538650).

Almost surely, 2^12042656 is an apocalyptic number.

12042656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12042656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12927600).

12042656 is an abundant number, since it is smaller than the sum of its proper divisors (13812544).

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

12042656 is a wasteful number, since it uses less digits than its factorization.

12042656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741 (or 733 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 12042656 is about 3470.2530167122. The cubic root of 12042656 is about 229.2137995543.

Adding to 12042656 its reverse (65624021), we get a palindrome (77666677).

The spelling of 12042656 in words is "twelve million, forty-two thousand, six hundred fifty-six".