12581328 has 20 divisors (see below), whose sum is σ = 32501888. Its totient is φ = 4193760.

The previous prime is 12581323. The next prime is 12581329. The reversal of 12581328 is 82318521.

It is a junction number, because it is equal to n+sod(n) for n = 12581295 and 12581304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12581323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131008 + ... + 131103.

Almost surely, 2^12581328 is an apocalyptic number.

It is an amenable number.

12581328 is an abundant number, since it is smaller than the sum of its proper divisors (19920560).

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

12581328 is a wasteful number, since it uses less digits than its factorization.

12581328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262122 (or 262116 counting only the distinct ones).

The product of its digits is 3840, while the sum is 30.

The square root of 12581328 is about 3547.0167746996. The cubic root of 12581328 is about 232.5816755479.

Adding to 12581328 its reverse (82318521), we get a palindrome (94899849).

The spelling of 12581328 in words is "twelve million, five hundred eighty-one thousand, three hundred twenty-eight".