12889427 has 4 divisors (see below), whose sum is σ = 13333920. Its totient is φ = 12444936.

The previous prime is 12889423. The next prime is 12889433. The reversal of 12889427 is 72498821.

12889427 is digitally balanced in base 2, 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 an emirpimes, since its reverse is a distinct semiprime: 72498821 = 1753 ⋅41357.

It is a cyclic number.

It is not a de Polignac number, because 12889427 - 2² = 12889423 is a prime.

It is a super-2 number, since 2×12889427² = 332274656776658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12889423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222203 + ... + 222260.

It is an arithmetic number, because the mean of its divisors is an integer number (3333480).

Almost surely, 2^12889427 is an apocalyptic number.

12889427 is a deficient number, since it is larger than the sum of its proper divisors (444493).

12889427 is an equidigital number, since it uses as much as digits as its factorization.

12889427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444492.

The product of its digits is 64512, while the sum is 41.

The square root of 12889427 is about 3590.1848141844. The cubic root of 12889427 is about 234.4649180792.

The spelling of 12889427 in words is "twelve million, eight hundred eighty-nine thousand, four hundred twenty-seven".