12406 has 4 divisors (see below), whose sum is σ = 18612. Its totient is φ = 6202.

The previous prime is 12401. The next prime is 12409. The reversal of 12406 is 60421.

12406 is digitally balanced in base 2, 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.

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3100 + ... + 3103.

It is an arithmetic number, because the mean of its divisors is an integer number (4653).

2¹²⁴⁰⁶ is an apocalyptic number.

12406 is a deficient number, since it is larger than the sum of its proper divisors (6206).

12406 is an equidigital number, since it uses as much as digits as its factorization.

12406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6205.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 12406 is about 111.3822247937. The cubic root of 12406 is about 23.1496231514.

Adding to 12406 its reverse (60421), we get a palindrome (72827).

The spelling of 12406 in words is "twelve thousand, four hundred six".