13020569 has 4 divisors (see below), whose sum is σ = 13031220. Its totient is φ = 13009920.

The previous prime is 13020541. The next prime is 13020577. The reversal of 13020569 is 96502031.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 6568969 + 6451600 = 2563^2 + 2540^2 .

It is a cyclic number.

It is not a de Polignac number, because 13020569 - 2¹² = 13016473 is a prime.

It is a super-2 number, since 2×13020569² = 339070434167522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13020169) 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 3 ways as a sum of consecutive naturals, for example, 3212 + ... + 6029.

It is an arithmetic number, because the mean of its divisors is an integer number (3257805).

Almost surely, 2^13020569 is an apocalyptic number.

It is an amenable number.

13020569 is a deficient number, since it is larger than the sum of its proper divisors (10651).

13020569 is an equidigital number, since it uses as much as digits as its factorization.

13020569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10650.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 13020569 is about 3608.4025551482. The cubic root of 13020569 is about 235.2574152275.

The spelling of 13020569 in words is "thirteen million, twenty thousand, five hundred sixty-nine".