13520401 has 4 divisors (see below), whose sum is σ = 13532400. Its totient is φ = 13508404.

The previous prime is 13520387. The next prime is 13520411. The reversal of 13520401 is 10402531.

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 an emirpimes, since its reverse is a distinct semiprime: 10402531 = 1439 ⋅7229.

It is a cyclic number.

It is not a de Polignac number, because 13520401 - 2¹¹ = 13518353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13520411) 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, 4111 + ... + 6628.

It is an arithmetic number, because the mean of its divisors is an integer number (3383100).

Almost surely, 2^13520401 is an apocalyptic number.

It is an amenable number.

13520401 is a deficient number, since it is larger than the sum of its proper divisors (11999).

13520401 is a wasteful number, since it uses less digits than its factorization.

13520401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11998.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 13520401 is about 3677.0097905771. The cubic root of 13520401 is about 238.2300402749.

Adding to 13520401 its reverse (10402531), we get a palindrome (23922932).

The spelling of 13520401 in words is "thirteen million, five hundred twenty thousand, four hundred one".