13243281 has 4 divisors (see below), whose sum is σ = 17657712. Its totient is φ = 8828852.

The previous prime is 13243273. The next prime is 13243297. The reversal of 13243281 is 18234231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13243281 - 2³ = 13243273 is a prime.

It is a super-2 number, since 2×13243281² = 350768983289922, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13243201) 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, 2207211 + ... + 2207216.

It is an arithmetic number, because the mean of its divisors is an integer number (4414428).

Almost surely, 2^13243281 is an apocalyptic number.

It is an amenable number.

13243281 is a deficient number, since it is larger than the sum of its proper divisors (4414431).

13243281 is an equidigital number, since it uses as much as digits as its factorization.

13243281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4414430.

The product of its digits is 1152, while the sum is 24.

The square root of 13243281 is about 3639.1319019788. The cubic root of 13243281 is about 236.5911696856.

The spelling of 13243281 in words is "thirteen million, two hundred forty-three thousand, two hundred eighty-one".