12802081 has 4 divisors (see below), whose sum is σ = 12982464. Its totient is φ = 12621700.

The previous prime is 12802073. The next prime is 12802091. The reversal of 12802081 is 18020821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12802081 - 2³ = 12802073 is a prime.

It is a super-2 number, since 2×12802081² = 327786555861122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) 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 not an unprimeable number, because it can be changed into a prime (12802091) 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, 90085 + ... + 90226.

It is an arithmetic number, because the mean of its divisors is an integer number (3245616).

Almost surely, 2^12802081 is an apocalyptic number.

It is an amenable number.

12802081 is a deficient number, since it is larger than the sum of its proper divisors (180383).

12802081 is an equidigital number, since it uses as much as digits as its factorization.

12802081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180382.

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 12802081 is about 3577.9995807714. Note that the first 3 decimals coincide. The cubic root of 12802081 is about 233.9340952053.

It can be divided in two parts, 1 and 2802081, that added together give a palindrome (2802082).

The spelling of 12802081 in words is "twelve million, eight hundred two thousand, eighty-one".