12748809 has 8 divisors (see below), whose sum is σ = 17123040. Its totient is φ = 8436896.

The previous prime is 12748787. The next prime is 12748811. The reversal of 12748809 is 90884721.

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 12748809 - 2⁸ = 12748553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12748859) 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 7 ways as a sum of consecutive naturals, for example, 15099 + ... + 15920.

It is an arithmetic number, because the mean of its divisors is an integer number (2140380).

Almost surely, 2^12748809 is an apocalyptic number.

It is an amenable number.

12748809 is a deficient number, since it is larger than the sum of its proper divisors (4374231).

12748809 is a wasteful number, since it uses less digits than its factorization.

12748809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31159.

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 12748809 is about 3570.5474370186. The cubic root of 12748809 is about 233.6091620167.

The spelling of 12748809 in words is "twelve million, seven hundred forty-eight thousand, eight hundred nine".