12409439 has 8 divisors (see below), whose sum is σ = 15016608. Its totient is φ = 10010880.

The previous prime is 12409433. The next prime is 12409459. The reversal of 12409439 is 93490421.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12409439 - 2¹² = 12405343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12409433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52022 + ... + 52259.

It is an arithmetic number, because the mean of its divisors is an integer number (1877076).

Almost surely, 2^12409439 is an apocalyptic number.

12409439 is a deficient number, since it is larger than the sum of its proper divisors (2607169).

12409439 is a wasteful number, since it uses less digits than its factorization.

12409439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104305.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 12409439 is about 3522.7033653148. The cubic root of 12409439 is about 231.5176201433.

The spelling of 12409439 in words is "twelve million, four hundred nine thousand, four hundred thirty-nine".