12443542 has 4 divisors (see below), whose sum is σ = 18665316. Its totient is φ = 6221770.

The previous prime is 12443539. The next prime is 12443551. The reversal of 12443542 is 24534421.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3110884 + ... + 3110887.

It is an arithmetic number, because the mean of its divisors is an integer number (4666329).

Almost surely, 2^12443542 is an apocalyptic number.

12443542 is a deficient number, since it is larger than the sum of its proper divisors (6221774).

12443542 is an equidigital number, since it uses as much as digits as its factorization.

12443542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6221773.

The product of its digits is 3840, while the sum is 25.

The square root of 12443542 is about 3527.5405029567. The cubic root of 12443542 is about 231.7295078792.

Adding to 12443542 its reverse (24534421), we get a palindrome (36977963).

The spelling of 12443542 in words is "twelve million, four hundred forty-three thousand, five hundred forty-two".