13020281 has 4 divisors (see below), whose sum is σ = 13093200. Its totient is φ = 12947364.

The previous prime is 13020251. The next prime is 13020307. The reversal of 13020281 is 18202031.

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, and also an emirpimes, since its reverse is a distinct semiprime: 18202031 = 59 ⋅308509.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13020281 is a prime.

It is a super-2 number, since 2×13020281² = 339055434637922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13020211) 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 3 ways as a sum of consecutive naturals, for example, 36191 + ... + 36548.

It is an arithmetic number, because the mean of its divisors is an integer number (3273300).

Almost surely, 2^13020281 is an apocalyptic number.

It is an amenable number.

13020281 is a deficient number, since it is larger than the sum of its proper divisors (72919).

13020281 is an equidigital number, since it uses as much as digits as its factorization.

13020281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72918.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 13020281 is about 3608.3626480718. The cubic root of 13020281 is about 235.2556806736.

The spelling of 13020281 in words is "thirteen million, twenty thousand, two hundred eighty-one".