12815042 has 32 divisors (see below), whose sum is σ = 21636720. Its totient is φ = 5662720.

The previous prime is 12815041. The next prime is 12815053. The reversal of 12815042 is 24051821.

It can be written as a sum of positive squares in 8 ways, for example, as 1852321 + 10962721 = 1361^2 + 3311^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12814999 and 12815017.

It is not an unprimeable number, because it can be changed into a prime (12815041) 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, 40268 + ... + 40584.

Almost surely, 2^12815042 is an apocalyptic number.

12815042 is a deficient number, since it is larger than the sum of its proper divisors (8821678).

12815042 is a wasteful number, since it uses less digits than its factorization.

12815042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 12815042 is about 3579.8103301711. The cubic root of 12815042 is about 234.0130145926.

Adding to 12815042 its reverse (24051821), we get a palindrome (36866863).

The spelling of 12815042 in words is "twelve million, eight hundred fifteen thousand, forty-two".