13442139 has 16 divisors (see below), whose sum is σ = 20963200. Its totient is φ = 8489448.

The previous prime is 13442131. The next prime is 13442153. The reversal of 13442139 is 93124431.

13442139 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13442139 - 2³ = 13442131 is a prime.

It is a super-2 number, since 2×13442139² = 361382201790642, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13442131) 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 15 ways as a sum of consecutive naturals, for example, 12589 + ... + 13614.

It is an arithmetic number, because the mean of its divisors is an integer number (1310200).

Almost surely, 2^13442139 is an apocalyptic number.

13442139 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

13442139 is a deficient number, since it is larger than the sum of its proper divisors (7521061).

13442139 is a wasteful number, since it uses less digits than its factorization.

13442139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26231 (or 26225 counting only the distinct ones).

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

The square root of 13442139 is about 3666.3522744003. The cubic root of 13442139 is about 237.7694905854.

The spelling of 13442139 in words is "thirteen million, four hundred forty-two thousand, one hundred thirty-nine".