12028613 has 4 divisors (see below), whose sum is σ = 12038208. Its totient is φ = 12019020.

The previous prime is 12028603. The next prime is 12028637. The reversal of 12028613 is 31682021.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 31682021 = 7 ⋅4526003.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12028613 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 (12028603) 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, 2573 + ... + 5538.

It is an arithmetic number, because the mean of its divisors is an integer number (3009552).

Almost surely, 2^12028613 is an apocalyptic number.

It is an amenable number.

12028613 is a deficient number, since it is larger than the sum of its proper divisors (9595).

12028613 is an equidigital number, since it uses as much as digits as its factorization.

12028613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9594.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 12028613 is about 3468.2290870126. The cubic root of 12028613 is about 229.1246691230.

The spelling of 12028613 in words is "twelve million, twenty-eight thousand, six hundred thirteen".