13521345 has 8 divisors (see below), whose sum is σ = 21634176. Its totient is φ = 7211376.

The previous prime is 13521329. The next prime is 13521359. The reversal of 13521345 is 54312531.

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

It is not a de Polignac number, because 13521345 - 2⁴ = 13521329 is a prime.

It is an unprimeable number.

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, 450697 + ... + 450726.

It is an arithmetic number, because the mean of its divisors is an integer number (2704272).

Almost surely, 2^13521345 is an apocalyptic number.

13521345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13521345 is a deficient number, since it is larger than the sum of its proper divisors (8112831).

13521345 is an equidigital number, since it uses as much as digits as its factorization.

13521345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901431.

The product of its digits is 1800, while the sum is 24.

The square root of 13521345 is about 3677.1381535101. The cubic root of 13521345 is about 238.2355845859.

Adding to 13521345 its reverse (54312531), we get a palindrome (67833876).

The spelling of 13521345 in words is "thirteen million, five hundred twenty-one thousand, three hundred forty-five".