13281073 has 4 divisors (see below), whose sum is σ = 14302708. Its totient is φ = 12259440.

The previous prime is 13281071. The next prime is 13281091. The reversal of 13281073 is 37018231.

13281073 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8714304 + 4566769 = 2952^2 + 2137^2 .

It is a cyclic number.

It is not a de Polignac number, because 13281073 - 2¹ = 13281071 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (13281071) 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, 510798 + ... + 510823.

It is an arithmetic number, because the mean of its divisors is an integer number (3575677).

Almost surely, 2^13281073 is an apocalyptic number.

13281073 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

13281073 is a deficient number, since it is larger than the sum of its proper divisors (1021635).

13281073 is a wasteful number, since it uses less digits than its factorization.

13281073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021634.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 13281073 is about 3644.3206499977. The cubic root of 13281073 is about 236.8160072668.

It can be divided in two parts, 1328 and 1073, that added together give a 4-th power (2401 = 7⁴).

The spelling of 13281073 in words is "thirteen million, two hundred eighty-one thousand, seventy-three".