12281568 has 72 divisors (see below), whose sum is σ = 34955928. Its totient is φ = 3773952.

The previous prime is 12281539. The next prime is 12281573. The reversal of 12281568 is 86518221.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15846 + ... + 16602.

It is an arithmetic number, because the mean of its divisors is an integer number (485499).

Almost surely, 2^12281568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12281568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17477964).

12281568 is an abundant number, since it is smaller than the sum of its proper divisors (22674360).

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

12281568 is a wasteful number, since it uses less digits than its factorization.

12281568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796 (or 775 counting only the distinct ones).

The product of its digits is 7680, while the sum is 33.

The square root of 12281568 is about 3504.5068126628. The cubic root of 12281568 is about 230.7196614216.

Adding to 12281568 its reverse (86518221), we get a palindrome (98799789).

The spelling of 12281568 in words is "twelve million, two hundred eighty-one thousand, five hundred sixty-eight".