12784121 has 8 divisors (see below), whose sum is σ = 15081984. Its totient is φ = 10604160.

The previous prime is 12784117. The next prime is 12784133. The reversal of 12784121 is 12148721.

12784121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 12784121 - 2² = 12784117 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (12784111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29240 + ... + 29673.

It is an arithmetic number, because the mean of its divisors is an integer number (1885248).

Almost surely, 2^12784121 is an apocalyptic number.

It is an amenable number.

12784121 is a deficient number, since it is larger than the sum of its proper divisors (2297863).

12784121 is an equidigital number, since it uses as much as digits as its factorization.

12784121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58951.

The product of its digits is 896, while the sum is 26.

The square root of 12784121 is about 3575.4889176167. The cubic root of 12784121 is about 233.8246488682.

It can be divided in two parts, 127 and 84121, that added together give a palindrome (84248).

The spelling of 12784121 in words is "twelve million, seven hundred eighty-four thousand, one hundred twenty-one".