10013521 has 4 divisors (see below), whose sum is σ = 11444032. Its totient is φ = 8583012.

The previous prime is 10013519. The next prime is 10013537. The reversal of 10013521 is 12531001.

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 a cyclic number.

It is not a de Polignac number, because 10013521 - 2¹ = 10013519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10013501) 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 3 ways as a sum of consecutive naturals, for example, 715245 + ... + 715258.

It is an arithmetic number, because the mean of its divisors is an integer number (2861008).

Almost surely, 2^10013521 is an apocalyptic number.

It is an amenable number.

10013521 is a deficient number, since it is larger than the sum of its proper divisors (1430511).

10013521 is an equidigital number, since it uses as much as digits as its factorization.

10013521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1430510.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 10013521 is about 3164.4147958193. The cubic root of 10013521 is about 215.5405256444.

Adding to 10013521 its reverse (12531001), we get a palindrome (22544522).

The spelling of 10013521 in words is "ten million, thirteen thousand, five hundred twenty-one".