12862909 has 4 divisors (see below), whose sum is σ = 12903804. Its totient is φ = 12822016.

The previous prime is 12862901. The next prime is 12862933. The reversal of 12862909 is 90926821.

12862909 is digitally balanced in base 2, 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, and also an emirpimes, since its reverse is a distinct semiprime: 90926821 = 2393 ⋅37997.

It can be written as a sum of positive squares in 2 ways, for example, as 3880900 + 8982009 = 1970^2 + 2997^2 .

It is not a de Polignac number, because 12862909 - 2³ = 12862901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12862901) 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, 19972 + ... + 20605.

It is an arithmetic number, because the mean of its divisors is an integer number (3225951).

Almost surely, 2^12862909 is an apocalyptic number.

It is an amenable number.

12862909 is a deficient number, since it is larger than the sum of its proper divisors (40895).

12862909 is an equidigital number, since it uses as much as digits as its factorization.

12862909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40894.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 12862909 is about 3586.4897880797. The cubic root of 12862909 is about 234.3040159317.

The spelling of 12862909 in words is "twelve million, eight hundred sixty-two thousand, nine hundred nine".