13145553 has 6 divisors (see below), whose sum is σ = 18988034. Its totient is φ = 8763696.

The previous prime is 13145533. The next prime is 13145557. The reversal of 13145553 is 35554131.

It can be written as a sum of positive squares in only one way, i.e., 7683984 + 5461569 = 2772^2 + 2337^2 .

It is not a de Polignac number, because 13145553 - 2¹⁶ = 13080017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13145557) 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, 730300 + ... + 730317.

Almost surely, 2^13145553 is an apocalyptic number.

It is an amenable number.

13145553 is a deficient number, since it is larger than the sum of its proper divisors (5842481).

13145553 is a wasteful number, since it uses less digits than its factorization.

13145553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1460623 (or 1460620 counting only the distinct ones).

The product of its digits is 4500, while the sum is 27.

The square root of 13145553 is about 3625.6796604223. The cubic root of 13145553 is about 236.0077621214.

Adding to 13145553 its reverse (35554131), we get a palindrome (48699684).

The spelling of 13145553 in words is "thirteen million, one hundred forty-five thousand, five hundred fifty-three".