13129569 has 6 divisors (see below), whose sum is σ = 18964946. Its totient is φ = 8753040.

The previous prime is 13129549. The next prime is 13129607. The reversal of 13129569 is 96592131.

It can be written as a sum of positive squares in only one way, i.e., 10112400 + 3017169 = 3180^2 + 1737^2 .

It is not a de Polignac number, because 13129569 - 2⁵ = 13129537 is a prime.

It is a super-2 number, since 2×13129569² = 344771164251522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13129549) 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 5 ways as a sum of consecutive naturals, for example, 729412 + ... + 729429.

Almost surely, 2^13129569 is an apocalyptic number.

It is an amenable number.

13129569 is a deficient number, since it is larger than the sum of its proper divisors (5835377).

13129569 is a wasteful number, since it uses less digits than its factorization.

13129569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1458847 (or 1458844 counting only the distinct ones).

The product of its digits is 14580, while the sum is 36.

The square root of 13129569 is about 3623.4747135864. The cubic root of 13129569 is about 235.9120674515.

The spelling of 13129569 in words is "thirteen million, one hundred twenty-nine thousand, five hundred sixty-nine".