12818561 has 8 divisors (see below), whose sum is σ = 15511680. Its totient is φ = 10340928.

The previous prime is 12818557. The next prime is 12818563. The reversal of 12818561 is 16581821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12818561 - 2² = 12818557 is a prime.

It is a super-2 number, since 2×12818561² = 328631012221442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12818563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53741 + ... + 53978.

It is an arithmetic number, because the mean of its divisors is an integer number (1938960).

Almost surely, 2^12818561 is an apocalyptic number.

It is an amenable number.

12818561 is a deficient number, since it is larger than the sum of its proper divisors (2693119).

12818561 is a wasteful number, since it uses less digits than its factorization.

12818561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107743.

The product of its digits is 3840, while the sum is 32.

The square root of 12818561 is about 3580.3018029211. The cubic root of 12818561 is about 234.0344325594.

The spelling of 12818561 in words is "twelve million, eight hundred eighteen thousand, five hundred sixty-one".