12815441 has 4 divisors (see below), whose sum is σ = 12880692. Its totient is φ = 12750192.

The previous prime is 12815437. The next prime is 12815447. The reversal of 12815441 is 14451821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6739216 + 6076225 = 2596^2 + 2465^2 .

It is a cyclic number.

It is not a de Polignac number, because 12815441 - 2² = 12815437 is a prime.

It is a super-3 number, since 3×12815441³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12815441.

It is not an unprimeable number, because it can be changed into a prime (12815447) 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, 32330 + ... + 32723.

It is an arithmetic number, because the mean of its divisors is an integer number (3220173).

Almost surely, 2^12815441 is an apocalyptic number.

It is an amenable number.

12815441 is a deficient number, since it is larger than the sum of its proper divisors (65251).

12815441 is an equidigital number, since it uses as much as digits as its factorization.

12815441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65250.

The product of its digits is 1280, while the sum is 26.

The square root of 12815441 is about 3579.8660589469. The cubic root of 12815441 is about 234.0154432548.

The spelling of 12815441 in words is "twelve million, eight hundred fifteen thousand, four hundred forty-one".