12815481 has 16 divisors (see below), whose sum is σ = 20556800. Its totient is φ = 6937488.

The previous prime is 12815471. The next prime is 12815489. The reversal of 12815481 is 18451821.

It is a happy number.

12815481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12815481 - 2⁶ = 12815417 is a prime.

It is a super-2 number, since 2×12815481² = 328473106522722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12815489) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15661 + ... + 16458.

It is an arithmetic number, because the mean of its divisors is an integer number (1284800).

Almost surely, 2^12815481 is an apocalyptic number.

It is an amenable number.

12815481 is a deficient number, since it is larger than the sum of its proper divisors (7741319).

12815481 is a wasteful number, since it uses less digits than its factorization.

12815481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32148.

The product of its digits is 2560, while the sum is 30.

The square root of 12815481 is about 3579.8716457437. The cubic root of 12815481 is about 234.0156867269.

The spelling of 12815481 in words is "twelve million, eight hundred fifteen thousand, four hundred eighty-one".