12405822 has 64 divisors (see below), whose sum is σ = 30723840. Its totient is φ = 3283200.

The previous prime is 12405817. The next prime is 12405829. The reversal of 12405822 is 22850421.

It is a junction number, because it is equal to n+sod(n) for n = 12405792 and 12405801.

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 31 ways as a sum of consecutive naturals, for example, 15922 + ... + 16682.

It is an arithmetic number, because the mean of its divisors is an integer number (480060).

Almost surely, 2^12405822 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12405822, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15361920).

12405822 is an abundant number, since it is smaller than the sum of its proper divisors (18318018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12405822 is a wasteful number, since it uses less digits than its factorization.

12405822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809.

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 12405822 is about 3522.1899437708. The cubic root of 12405822 is about 231.4951243478.

The spelling of 12405822 in words is "twelve million, four hundred five thousand, eight hundred twenty-two".