12442405 has 4 divisors (see below), whose sum is σ = 14930892. Its totient is φ = 9953920.

The previous prime is 12442387. The next prime is 12442411. The reversal of 12442405 is 50424421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50424421 = 293 ⋅172097.

It can be written as a sum of positive squares in 2 ways, for example, as 5919489 + 6522916 = 2433^2 + 2554^2 .

It is not a de Polignac number, because 12442405 - 2⁵ = 12442373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1244236 + ... + 1244245.

It is an arithmetic number, because the mean of its divisors is an integer number (3732723).

Almost surely, 2^12442405 is an apocalyptic number.

It is an amenable number.

12442405 is a deficient number, since it is larger than the sum of its proper divisors (2488487).

12442405 is an equidigital number, since it uses as much as digits as its factorization.

12442405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2488486.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 12442405 is about 3527.3793388293. The cubic root of 12442405 is about 231.7224497474.

Adding to 12442405 its reverse (50424421), we get a palindrome (62866826).

The spelling of 12442405 in words is "twelve million, four hundred forty-two thousand, four hundred five".