13520261 has 4 divisors (see below), whose sum is σ = 13530624. Its totient is φ = 13509900.

The previous prime is 13520249. The next prime is 13520279. The reversal of 13520261 is 16202531.

13520261 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, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 16202531 = 1061 ⋅15271.

It is a cyclic number.

It is not a de Polignac number, because 13520261 - 2⁶ = 13520197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13520231) 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, 2885 + ... + 5946.

It is an arithmetic number, because the mean of its divisors is an integer number (3382656).

Almost surely, 2^13520261 is an apocalyptic number.

It is an amenable number.

13520261 is a deficient number, since it is larger than the sum of its proper divisors (10363).

13520261 is an equidigital number, since it uses as much as digits as its factorization.

13520261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10362.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 13520261 is about 3676.9907533199. The cubic root of 13520261 is about 238.2292180034.

Adding to 13520261 its reverse (16202531), we get a palindrome (29722792).

The spelling of 13520261 in words is "thirteen million, five hundred twenty thousand, two hundred sixty-one".