12405533 has 16 divisors (see below), whose sum is σ = 15310080. Its totient is φ = 9816576.

The previous prime is 12405521. The next prime is 12405539. The reversal of 12405533 is 33550421.

12405533 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12405533 - 2⁶ = 12405469 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12405499 and 12405508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12405539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3341 + ... + 5997.

It is an arithmetic number, because the mean of its divisors is an integer number (956880).

Almost surely, 2^12405533 is an apocalyptic number.

It is an amenable number.

12405533 is a deficient number, since it is larger than the sum of its proper divisors (2904547).

12405533 is a wasteful number, since it uses less digits than its factorization.

12405533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2716.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 12405533 is about 3522.1489179193. The cubic root of 12405533 is about 231.4933267346.

Adding to 12405533 its reverse (33550421), we get a palindrome (45955954).

The spelling of 12405533 in words is "twelve million, four hundred five thousand, five hundred thirty-three".