12788305 has 8 divisors (see below), whose sum is σ = 15389352. Its totient is φ = 10201728.

The previous prime is 12788263. The next prime is 12788327. The reversal of 12788305 is 50388721.

It can be written as a sum of positive squares in 4 ways, for example, as 529 + 12787776 = 23^2 + 3576^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12788305 - 2⁷ = 12788177 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1564 + ... + 5293.

It is an arithmetic number, because the mean of its divisors is an integer number (1923669).

Almost surely, 2^12788305 is an apocalyptic number.

It is an amenable number.

12788305 is a deficient number, since it is larger than the sum of its proper divisors (2601047).

12788305 is an equidigital number, since it uses as much as digits as its factorization.

12788305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7235.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 12788305 is about 3576.0739645595. The cubic root of 12788305 is about 233.8501548747.

The spelling of 12788305 in words is "twelve million, seven hundred eighty-eight thousand, three hundred five".