12011553 has 18 divisors (see below), whose sum is σ = 18316194. Its totient is φ = 7584192.

The previous prime is 12011513. The next prime is 12011557. The reversal of 12011553 is 35511021.

12011553 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 7800849 + 4210704 = 2793^2 + 2052^2 .

It is not a de Polignac number, because 12011553 - 2⁸ = 12011297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12011557) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1401 + ... + 5097.

Almost surely, 2^12011553 is an apocalyptic number.

It is an amenable number.

12011553 is a deficient number, since it is larger than the sum of its proper divisors (6304641).

12011553 is a wasteful number, since it uses less digits than its factorization.

12011553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3741 (or 3719 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 12011553 is about 3465.7687458917. The cubic root of 12011553 is about 229.0162965208.

Adding to 12011553 its reverse (35511021), we get a palindrome (47522574).

The spelling of 12011553 in words is "twelve million, eleven thousand, five hundred fifty-three".