13457569 has 4 divisors (see below), whose sum is σ = 13543444. Its totient is φ = 13371696.

The previous prime is 13457551. The next prime is 13457579. The reversal of 13457569 is 96575431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96575431 = 97 ⋅995623.

It can be written as a sum of positive squares in 2 ways, for example, as 3294225 + 10163344 = 1815^2 + 3188^2 .

It is a cyclic number.

It is not a de Polignac number, because 13457569 - 2²³ = 5068961 is a prime.

It is a super-2 number, since 2×13457569² = 362212326779522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13457519) 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, 42702 + ... + 43015.

It is an arithmetic number, because the mean of its divisors is an integer number (3385861).

Almost surely, 2^13457569 is an apocalyptic number.

It is an amenable number.

13457569 is a deficient number, since it is larger than the sum of its proper divisors (85875).

13457569 is an equidigital number, since it uses as much as digits as its factorization.

13457569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85874.

The product of its digits is 113400, while the sum is 40.

The square root of 13457569 is about 3668.4559422187. The cubic root of 13457569 is about 237.8604329658.

The spelling of 13457569 in words is "thirteen million, four hundred fifty-seven thousand, five hundred sixty-nine".