13243138 has 8 divisors (see below), whose sum is σ = 20505600. Its totient is φ = 6407940.

The previous prime is 13243129. The next prime is 13243141. The reversal of 13243138 is 83134231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106738 + ... + 106861.

It is an arithmetic number, because the mean of its divisors is an integer number (2563200).

Almost surely, 2^13243138 is an apocalyptic number.

13243138 is a deficient number, since it is larger than the sum of its proper divisors (7262462).

13243138 is a wasteful number, since it uses less digits than its factorization.

13243138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213632.

The product of its digits is 1728, while the sum is 25.

The square root of 13243138 is about 3639.1122543829. The cubic root of 13243138 is about 236.5903181177.

Adding to 13243138 its reverse (83134231), we get a palindrome (96377369).

It can be divided in two parts, 132431 and 38, that multiplied together give a triangular number (5032378 = T₃₁₇₂).

The spelling of 13243138 in words is "thirteen million, two hundred forty-three thousand, one hundred thirty-eight".