12028641 has 4 divisors (see below), whose sum is σ = 16038192. Its totient is φ = 8019092.

The previous prime is 12028637. The next prime is 12028657. The reversal of 12028641 is 14682021.

12028641 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 12028641 - 2² = 12028637 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12028661) 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, 2004771 + ... + 2004776.

It is an arithmetic number, because the mean of its divisors is an integer number (4009548).

Almost surely, 2^12028641 is an apocalyptic number.

It is an amenable number.

12028641 is a deficient number, since it is larger than the sum of its proper divisors (4009551).

12028641 is an equidigital number, since it uses as much as digits as its factorization.

12028641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4009550.

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 12028641 is about 3468.2331236524. The cubic root of 12028641 is about 229.1248469070.

The spelling of 12028641 in words is "twelve million, twenty-eight thousand, six hundred forty-one".