12442819 has 4 divisors (see below), whose sum is σ = 12449944. Its totient is φ = 12435696.

The previous prime is 12442817. The next prime is 12442847. The reversal of 12442819 is 91824421.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12442819 - 2¹ = 12442817 is a prime.

It is a super-2 number, since 2×12442819² = 309647489333522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12442813) 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, 1039 + ... + 5095.

It is an arithmetic number, because the mean of its divisors is an integer number (3112486).

Almost surely, 2^12442819 is an apocalyptic number.

12442819 is a deficient number, since it is larger than the sum of its proper divisors (7125).

12442819 is an equidigital number, since it uses as much as digits as its factorization.

12442819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7124.

The product of its digits is 4608, while the sum is 31.

The square root of 12442819 is about 3527.4380221345. The cubic root of 12442819 is about 231.7250197766.

The spelling of 12442819 in words is "twelve million, four hundred forty-two thousand, eight hundred nineteen".