13680481 has 4 divisors (see below), whose sum is σ = 13806100. Its totient is φ = 13554864.

The previous prime is 13680479. The next prime is 13680539. The reversal of 13680481 is 18408631.

13680481 is digitally balanced in base 3, 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 11833600 + 1846881 = 3440^2 + 1359^2 .

It is a cyclic number.

It is not a de Polignac number, because 13680481 - 2¹ = 13680479 is a prime.

It is a super-2 number, since 2×13680481² = 374311120782722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13686481) 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, 62646 + ... + 62863.

It is an arithmetic number, because the mean of its divisors is an integer number (3451525).

Almost surely, 2^13680481 is an apocalyptic number.

It is an amenable number.

13680481 is a deficient number, since it is larger than the sum of its proper divisors (125619).

13680481 is a wasteful number, since it uses less digits than its factorization.

13680481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125618.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 13680481 is about 3698.7134249628. The cubic root of 13680481 is about 239.1665593177.

It can be divided in two parts, 13680 and 481, that added together give a square (14161 = 119²).

The spelling of 13680481 in words is "thirteen million, six hundred eighty thousand, four hundred eighty-one".