13081243 has 4 divisors (see below), whose sum is σ = 14950000. Its totient is φ = 11212488.

The previous prime is 13081231. The next prime is 13081247. The reversal of 13081243 is 34218031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34218031 = 19 ⋅1800949.

It is a de Polignac number, because none of the positive numbers 2^k-13081243 is a prime.

It is a super-2 number, since 2×13081243² = 342237836850098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13081247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 934368 + ... + 934381.

It is an arithmetic number, because the mean of its divisors is an integer number (3737500).

Almost surely, 2^13081243 is an apocalyptic number.

13081243 is a deficient number, since it is larger than the sum of its proper divisors (1868757).

13081243 is an equidigital number, since it uses as much as digits as its factorization.

13081243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1868756.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 13081243 is about 3616.8001050652. The cubic root of 13081243 is about 235.6222711211.

Adding to 13081243 its reverse (34218031), we get a palindrome (47299274).

The spelling of 13081243 in words is "thirteen million, eighty-one thousand, two hundred forty-three".