13125553 has 16 divisors (see below), whose sum is σ = 15534720. Its totient is φ = 10857600.

The previous prime is 13125551. The next prime is 13125569. The reversal of 13125553 is 35552131.

It is a cyclic number.

It is not a de Polignac number, because 13125553 - 2¹ = 13125551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13125551) 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 15 ways as a sum of consecutive naturals, for example, 24933 + ... + 25453.

It is an arithmetic number, because the mean of its divisors is an integer number (970920).

Almost surely, 2^13125553 is an apocalyptic number.

It is an amenable number.

13125553 is a deficient number, since it is larger than the sum of its proper divisors (2409167).

13125553 is an equidigital number, since it uses as much as digits as its factorization.

13125553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648.

The product of its digits is 2250, while the sum is 25.

The square root of 13125553 is about 3622.9205069943. The cubic root of 13125553 is about 235.8880118389. Note that the first 3 decimals are identical.

Adding to 13125553 its reverse (35552131), we get a palindrome (48677684).

The spelling of 13125553 in words is "thirteen million, one hundred twenty-five thousand, five hundred fifty-three".