13244139 has 24 divisors (see below), whose sum is σ = 20470320. Its totient is φ = 8222208.

The previous prime is 13244123. The next prime is 13244141. The reversal of 13244139 is 93144231.

It is not a de Polignac number, because 13244139 - 2⁴ = 13244123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13244149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15967 + ... + 16775.

It is an arithmetic number, because the mean of its divisors is an integer number (852930).

Almost surely, 2^13244139 is an apocalyptic number.

13244139 is a deficient number, since it is larger than the sum of its proper divisors (7226181).

13244139 is a wasteful number, since it uses less digits than its factorization.

13244139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 939 (or 936 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 13244139 is about 3639.2497853266. The cubic root of 13244139 is about 236.5962789643.

The spelling of 13244139 in words is "thirteen million, two hundred forty-four thousand, one hundred thirty-nine".