12442889 has 4 divisors (see below), whose sum is σ = 12455424. Its totient is φ = 12430356.

The previous prime is 12442883. The next prime is 12442901. The reversal of 12442889 is 98824421.

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 a de Polignac number, because none of the positive numbers 2^k-12442889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12442883) 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, 4637 + ... + 6810.

It is an arithmetic number, because the mean of its divisors is an integer number (3113856).

Almost surely, 2^12442889 is an apocalyptic number.

It is an amenable number.

12442889 is a deficient number, since it is larger than the sum of its proper divisors (12535).

12442889 is a wasteful number, since it uses less digits than its factorization.

12442889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12534.

The product of its digits is 36864, while the sum is 38.

The square root of 12442889 is about 3527.4479443360. The cubic root of 12442889 is about 231.7254543169.

It can be divided in two parts, 12442 and 889, that added together give a palindrome (13331).

The spelling of 12442889 in words is "twelve million, four hundred forty-two thousand, eight hundred eighty-nine".