12816535 has 4 divisors (see below), whose sum is σ = 15379848. Its totient is φ = 10253224.

The previous prime is 12816523. The next prime is 12816553. The reversal of 12816535 is 53561821.

12816535 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12816535 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12816497 and 12816506.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1281649 + ... + 1281658.

It is an arithmetic number, because the mean of its divisors is an integer number (3844962).

Almost surely, 2^12816535 is an apocalyptic number.

12816535 is a deficient number, since it is larger than the sum of its proper divisors (2563313).

12816535 is an equidigital number, since it uses as much as digits as its factorization.

12816535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2563312.

The product of its digits is 7200, while the sum is 31.

The square root of 12816535 is about 3580.0188546990. The cubic root of 12816535 is about 234.0221020349.

The spelling of 12816535 in words is "twelve million, eight hundred sixteen thousand, five hundred thirty-five".