12439911 has 16 divisors (see below), whose sum is σ = 18207360. Its totient is φ = 7492320.

The previous prime is 12439909. The next prime is 12439919. The reversal of 12439911 is 11993421.

It is not a de Polignac number, because 12439911 - 2¹ = 12439909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12439919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4620 + ... + 6798.

It is an arithmetic number, because the mean of its divisors is an integer number (1137960).

Almost surely, 2^12439911 is an apocalyptic number.

12439911 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12439911 is a deficient number, since it is larger than the sum of its proper divisors (5767449).

12439911 is a wasteful number, since it uses less digits than its factorization.

12439911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2366.

The product of its digits is 1944, while the sum is 30.

The square root of 12439911 is about 3527.0258008696. The cubic root of 12439911 is about 231.7069662883.

The spelling of 12439911 in words is "twelve million, four hundred thirty-nine thousand, nine hundred eleven".