12163405 has 4 divisors (see below), whose sum is σ = 14596092. Its totient is φ = 9730720.

The previous prime is 12163399. The next prime is 12163409. The reversal of 12163405 is 50436121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50436121 = 383 ⋅131687.

It can be written as a sum of positive squares in 2 ways, for example, as 2842596 + 9320809 = 1686^2 + 3053^2 .

It is not a de Polignac number, because 12163405 - 2⁹ = 12162893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12163409) 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, 1216336 + ... + 1216345.

It is an arithmetic number, because the mean of its divisors is an integer number (3649023).

Almost surely, 2^12163405 is an apocalyptic number.

It is an amenable number.

12163405 is a deficient number, since it is larger than the sum of its proper divisors (2432687).

12163405 is an equidigital number, since it uses as much as digits as its factorization.

12163405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2432686.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 12163405 is about 3487.6073460182. The cubic root of 12163405 is about 229.9773449645.

Adding to 12163405 its reverse (50436121), we get a palindrome (62599526).

The spelling of 12163405 in words is "twelve million, one hundred sixty-three thousand, four hundred five".