13524321 has 4 divisors (see below), whose sum is σ = 18032432. Its totient is φ = 9016212.

The previous prime is 13524311. The next prime is 13524323. The reversal of 13524321 is 12342531.

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.

It is not a de Polignac number, because 13524321 - 2⁷ = 13524193 is a prime.

It is a super-2 number, since 2×13524321² = 365814517022082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13524323) 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, 2254051 + ... + 2254056.

It is an arithmetic number, because the mean of its divisors is an integer number (4508108).

Almost surely, 2^13524321 is an apocalyptic number.

It is an amenable number.

13524321 is a deficient number, since it is larger than the sum of its proper divisors (4508111).

13524321 is an equidigital number, since it uses as much as digits as its factorization.

13524321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4508110.

The product of its digits is 720, while the sum is 21.

The square root of 13524321 is about 3677.5427937687. The cubic root of 13524321 is about 238.2530615724.

Adding to 13524321 its reverse (12342531), we get a palindrome (25866852).

The spelling of 13524321 in words is "thirteen million, five hundred twenty-four thousand, three hundred twenty-one".