12439505 has 16 divisors (see below), whose sum is σ = 16169664. Its totient is φ = 9132480.

The previous prime is 12439447. The next prime is 12439517. The reversal of 12439505 is 50593421.

It is not a de Polignac number, because 12439505 - 2¹⁴ = 12423121 is a prime.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13262 + ... + 14168.

It is an arithmetic number, because the mean of its divisors is an integer number (1010604).

Almost surely, 2^12439505 is an apocalyptic number.

It is an amenable number.

12439505 is a deficient number, since it is larger than the sum of its proper divisors (3730159).

12439505 is a wasteful number, since it uses less digits than its factorization.

12439505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1136.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 12439505 is about 3526.9682448244. The cubic root of 12439505 is about 231.7044455294.

The spelling of 12439505 in words is "twelve million, four hundred thirty-nine thousand, five hundred five".