13239005 has 16 divisors (see below), whose sum is σ = 18116784. Its totient is φ = 9200640.

The previous prime is 13239001. The next prime is 13239043. The reversal of 13239005 is 50093231.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 436921 + 12802084 = 661^2 + 3578^2 .

It is not a de Polignac number, because 13239005 - 2² = 13239001 is a prime.

It is a super-6 number, since 6×13239005⁶ (a number of 44 digits) contains 666666 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13239001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4886 + ... + 7095.

It is an arithmetic number, because the mean of its divisors is an integer number (1132299).

Almost surely, 2^13239005 is an apocalyptic number.

It is an amenable number.

13239005 is a deficient number, since it is larger than the sum of its proper divisors (4877779).

13239005 is a wasteful number, since it uses less digits than its factorization.

13239005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12016.

The product of its (nonzero) digits is 810, while the sum is 23.

The square root of 13239005 is about 3638.5443517978. The cubic root of 13239005 is about 236.5657033694.

The spelling of 13239005 in words is "thirteen million, two hundred thirty-nine thousand, five".