12553409 has 4 divisors (see below), whose sum is σ = 13694640. Its totient is φ = 11412180.

The previous prime is 12553403. The next prime is 12553417. The reversal of 12553409 is 90435521.

12553409 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12553409 - 2²⁰ = 11504833 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 (12553403) 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, 570599 + ... + 570620.

It is an arithmetic number, because the mean of its divisors is an integer number (3423660).

Almost surely, 2^12553409 is an apocalyptic number.

It is an amenable number.

12553409 is a deficient number, since it is larger than the sum of its proper divisors (1141231).

12553409 is a wasteful number, since it uses less digits than its factorization.

12553409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1141230.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 12553409 is about 3543.0790281900. The cubic root of 12553409 is about 232.4095088552.

It can be divided in two parts, 1255 and 3409, that added together give a palindrome (4664).

The spelling of 12553409 in words is "twelve million, five hundred fifty-three thousand, four hundred nine".