12442567 has 4 divisors (see below), whose sum is σ = 12482136. Its totient is φ = 12403000.

The previous prime is 12442561. The next prime is 12442601. The reversal of 12442567 is 76524421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76524421 = 53 ⋅1443857.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12442567 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a pancake number, because a pancake can be divided into 12442567 parts by 4988 straight cuts.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12442561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19309 + ... + 19942.

It is an arithmetic number, because the mean of its divisors is an integer number (3120534).

Almost surely, 2^12442567 is an apocalyptic number.

12442567 is a deficient number, since it is larger than the sum of its proper divisors (39569).

12442567 is an equidigital number, since it uses as much as digits as its factorization.

12442567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39568.

The product of its digits is 13440, while the sum is 31.

The square root of 12442567 is about 3527.4023019780. The cubic root of 12442567 is about 231.7234554178.

Adding to 12442567 its reverse (76524421), we get a palindrome (88966988).

The spelling of 12442567 in words is "twelve million, four hundred forty-two thousand, five hundred sixty-seven".