12859309 has 4 divisors (see below), whose sum is σ = 12901504. Its totient is φ = 12817116.

The previous prime is 12859303. The next prime is 12859321. The reversal of 12859309 is 90395821.

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 12859309 - 2¹³ = 12851117 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 (12859303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20637 + ... + 21250.

It is an arithmetic number, because the mean of its divisors is an integer number (3225376).

Almost surely, 2^12859309 is an apocalyptic number.

It is an amenable number.

12859309 is a deficient number, since it is larger than the sum of its proper divisors (42195).

12859309 is an equidigital number, since it uses as much as digits as its factorization.

12859309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42194.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 12859309 is about 3585.9878694720. The cubic root of 12859309 is about 234.2821553204.

The spelling of 12859309 in words is "twelve million, eight hundred fifty-nine thousand, three hundred nine".