13332561 has 8 divisors (see below), whose sum is σ = 19392864. Its totient is φ = 8080320.

The previous prime is 13332551. The next prime is 13332563. The reversal of 13332561 is 16523331.

It is a happy number.

13332561 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13332561 - 2⁹ = 13332049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13332563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201976 + ... + 202041.

It is an arithmetic number, because the mean of its divisors is an integer number (2424108).

Almost surely, 2^13332561 is an apocalyptic number.

13332561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13332561 is a deficient number, since it is larger than the sum of its proper divisors (6060303).

13332561 is a wasteful number, since it uses less digits than its factorization.

13332561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404031.

The product of its digits is 1620, while the sum is 24.

The square root of 13332561 is about 3651.3779590724. The cubic root of 13332561 is about 237.1216416988.

Adding to 13332561 its reverse (16523331), we get a palindrome (29855892).

It can be divided in two parts, 133325 and 61, that added together give a triangular number (133386 = T₅₁₆).

The spelling of 13332561 in words is "thirteen million, three hundred thirty-two thousand, five hundred sixty-one".