12408439 has 4 divisors (see below), whose sum is σ = 12471624. Its totient is φ = 12345256.

The previous prime is 12408427. The next prime is 12408443. The reversal of 12408439 is 93480421.

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

It is a cyclic number.

It is not a de Polignac number, because 12408439 - 2¹¹ = 12406391 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12408439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12408479) 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, 31297 + ... + 31690.

It is an arithmetic number, because the mean of its divisors is an integer number (3117906).

Almost surely, 2^12408439 is an apocalyptic number.

12408439 is a deficient number, since it is larger than the sum of its proper divisors (63185).

12408439 is an equidigital number, since it uses as much as digits as its factorization.

12408439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63184.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 12408439 is about 3522.5614260081. The cubic root of 12408439 is about 231.5114011182.

The spelling of 12408439 in words is "twelve million, four hundred eight thousand, four hundred thirty-nine".