12812869 has 4 divisors (see below), whose sum is σ = 13125420. Its totient is φ = 12500320.

The previous prime is 12812861. The next prime is 12812893. The reversal of 12812869 is 96821821.

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 1723969 + 11088900 = 1313^2 + 3330^2 .

It is a cyclic number.

It is not a de Polignac number, because 12812869 - 2³ = 12812861 is a prime.

It is a super-2 number, since 2×12812869² = 328339224022322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12812861) 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, 156214 + ... + 156295.

It is an arithmetic number, because the mean of its divisors is an integer number (3281355).

Almost surely, 2^12812869 is an apocalyptic number.

It is an amenable number.

12812869 is a deficient number, since it is larger than the sum of its proper divisors (312551).

12812869 is an equidigital number, since it uses as much as digits as its factorization.

12812869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312550.

The product of its digits is 13824, while the sum is 37.

The square root of 12812869 is about 3579.5068096038. The cubic root of 12812869 is about 233.9997869334. Note that the first 3 decimals are identical.

The spelling of 12812869 in words is "twelve million, eight hundred twelve thousand, eight hundred sixty-nine".