12405823 has 4 divisors (see below), whose sum is σ = 12833640. Its totient is φ = 11978008.

The previous prime is 12405817. The next prime is 12405829. The reversal of 12405823 is 32850421.

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

It is an interprime number because it is at equal distance from previous prime (12405817) and next prime (12405829).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12405823 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 (12405829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213865 + ... + 213922.

It is an arithmetic number, because the mean of its divisors is an integer number (3208410).

Almost surely, 2^12405823 is an apocalyptic number.

12405823 is a deficient number, since it is larger than the sum of its proper divisors (427817).

12405823 is an equidigital number, since it uses as much as digits as its factorization.

12405823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427816.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 12405823 is about 3522.1900857279. The cubic root of 12405823 is about 231.4951305679.

The spelling of 12405823 in words is "twelve million, four hundred five thousand, eight hundred twenty-three".