13245585921 has 12 divisors (see below), whose sum is σ = 20257955172. Its totient is φ = 8310955776.

The previous prime is 13245585877. The next prime is 13245585929. The reversal of 13245585921 is 12958554231.

13245585921 is a `hidden beast` number, since 1 + 3 + 2 + 4 + 5 + 58 + 592 + 1 = 666.

13245585921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 9223489521 + 4022096400 = 96039^2 + 63420^2 .

It is not a de Polignac number, because 13245585921 - 2¹³ = 13245577729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13245585929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43286076 + ... + 43286381.

It is an arithmetic number, because the mean of its divisors is an integer number (1688162931).

Almost surely, 2^13245585921 is an apocalyptic number.

It is an amenable number.

13245585921 is a deficient number, since it is larger than the sum of its proper divisors (7012369251).

13245585921 is a wasteful number, since it uses less digits than its factorization.

13245585921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86572480 (or 86572477 counting only the distinct ones).

The product of its digits is 432000, while the sum is 45.

The spelling of 13245585921 in words is "thirteen billion, two hundred forty-five million, five hundred eighty-five thousand, nine hundred twenty-one".