14013521 has 4 divisors (see below), whose sum is σ = 14027700. Its totient is φ = 13999344.

The previous prime is 14013511. The next prime is 14013533. The reversal of 14013521 is 12531041.

14013521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5953600 + 8059921 = 2440^2 + 2839^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14013521 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 14013521.

It is not an unprimeable number, because it can be changed into a prime (14013511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5486 + ... + 7623.

It is an arithmetic number, because the mean of its divisors is an integer number (3506925).

Almost surely, 2^14013521 is an apocalyptic number.

It is an amenable number.

14013521 is a deficient number, since it is larger than the sum of its proper divisors (14179).

14013521 is a wasteful number, since it uses less digits than its factorization.

14013521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14178.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 14013521 is about 3743.4637703603. The cubic root of 14013521 is about 241.0917908183.

Adding to 14013521 its reverse (12531041), we get a palindrome (26544562).

The spelling of 14013521 in words is "fourteen million, thirteen thousand, five hundred twenty-one".