12013456 has 80 divisors (see below), whose sum is σ = 29553664. Its totient is φ = 4603392.

The previous prime is 12013447. The next prime is 12013459. The reversal of 12013456 is 65431021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12013459) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 53761 + ... + 53983.

Almost surely, 2^12013456 is an apocalyptic number.

12013456 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 12013456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14776832).

12013456 is an abundant number, since it is smaller than the sum of its proper divisors (17540208).

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

12013456 is a wasteful number, since it uses less digits than its factorization.

12013456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288 (or 282 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 12013456 is about 3466.0432772832. The cubic root of 12013456 is about 229.0283902942.

Adding to 12013456 its reverse (65431021), we get a palindrome (77444477).

The spelling of 12013456 in words is "twelve million, thirteen thousand, four hundred fifty-six".