13521307 has 16 divisors (see below), whose sum is σ = 14968800. Its totient is φ = 12160512.

The previous prime is 13521283. The next prime is 13521323. The reversal of 13521307 is 70312531.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13521307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13521367) 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 15 ways as a sum of consecutive naturals, for example, 38569 + ... + 38917.

It is an arithmetic number, because the mean of its divisors is an integer number (935550).

Almost surely, 2^13521307 is an apocalyptic number.

13521307 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

13521307 is a deficient number, since it is larger than the sum of its proper divisors (1447493).

13521307 is a wasteful number, since it uses less digits than its factorization.

13521307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462.

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 13521307 is about 3677.1329864447. The cubic root of 13521307 is about 238.2353614089.

Adding to 13521307 its reverse (70312531), we get a palindrome (83833838).

The spelling of 13521307 in words is "thirteen million, five hundred twenty-one thousand, three hundred seven".