12862081 has 4 divisors (see below), whose sum is σ = 13618692. Its totient is φ = 12105472.

The previous prime is 12862049. The next prime is 12862097. The reversal of 12862081 is 18026821.

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 5022081 + 7840000 = 2241^2 + 2800^2 .

It is a cyclic number.

It is not a de Polignac number, because 12862081 - 2⁵ = 12862049 is a prime.

It is a super-2 number, since 2×12862081² = 330866255301122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12862021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 378280 + ... + 378313.

It is an arithmetic number, because the mean of its divisors is an integer number (3404673).

Almost surely, 2^12862081 is an apocalyptic number.

It is an amenable number.

12862081 is a deficient number, since it is larger than the sum of its proper divisors (756611).

12862081 is an equidigital number, since it uses as much as digits as its factorization.

12862081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756610.

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 12862081 is about 3586.3743530201. The cubic root of 12862081 is about 234.2989883523.

The spelling of 12862081 in words is "twelve million, eight hundred sixty-two thousand, eighty-one".