12422420 has 24 divisors (see below), whose sum is σ = 26195400. Its totient is φ = 4948352.

The previous prime is 12422407. The next prime is 12422437. The reversal of 12422420 is 2422421.

It is a happy number.

12422420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 712336 + 11710084 = 844^2 + 3422^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4226 + ... + 6534.

It is an arithmetic number, because the mean of its divisors is an integer number (1091475).

Almost surely, 2^12422420 is an apocalyptic number.

12422420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12422420 is an abundant number, since it is smaller than the sum of its proper divisors (13772980).

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

12422420 is a wasteful number, since it uses less digits than its factorization.

12422420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2587 (or 2585 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 12422420 is about 3524.5453607522. The cubic root of 12422420 is about 231.5983190080.

Adding to 12422420 its reverse (2422421), we get a palindrome (14844841).

Subtracting from 12422420 its reverse (2422421), we obtain a palindrome (9999999).

The spelling of 12422420 in words is "twelve million, four hundred twenty-two thousand, four hundred twenty".