12428881 has 4 divisors (see below), whose sum is σ = 12639600. Its totient is φ = 12218164.

The previous prime is 12428837. The next prime is 12428891. The reversal of 12428881 is 18882421.

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 12428881 - 2⁷ = 12428753 is a prime.

It is a super-2 number, since 2×12428881² = 308954165824322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12428891) 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, 105271 + ... + 105388.

It is an arithmetic number, because the mean of its divisors is an integer number (3159900).

Almost surely, 2^12428881 is an apocalyptic number.

It is an amenable number.

12428881 is a deficient number, since it is larger than the sum of its proper divisors (210719).

12428881 is an equidigital number, since it uses as much as digits as its factorization.

12428881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210718.

The product of its digits is 8192, while the sum is 34.

The square root of 12428881 is about 3525.4618137203. The cubic root of 12428881 is about 231.6384640950.

The spelling of 12428881 in words is "twelve million, four hundred twenty-eight thousand, eight hundred eighty-one".