12161423 has 4 divisors (see below), whose sum is σ = 12177480. Its totient is φ = 12145368.

The previous prime is 12161417. The next prime is 12161431. The reversal of 12161423 is 32416121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12161423 - 2⁸ = 12161167 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12161395 and 12161404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12161453) 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, 6833 + ... + 8426.

It is an arithmetic number, because the mean of its divisors is an integer number (3044370).

Almost surely, 2^12161423 is an apocalyptic number.

12161423 is a deficient number, since it is larger than the sum of its proper divisors (16057).

12161423 is an equidigital number, since it uses as much as digits as its factorization.

12161423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16056.

The product of its digits is 288, while the sum is 20.

The square root of 12161423 is about 3487.3231854820. The cubic root of 12161423 is about 229.9648528524.

Adding to 12161423 its reverse (32416121), we get a palindrome (44577544).

The spelling of 12161423 in words is "twelve million, one hundred sixty-one thousand, four hundred twenty-three".