12420522 has 24 divisors (see below), whose sum is σ = 27780480. Its totient is φ = 4006440.

The previous prime is 12420521. The next prime is 12420571. The reversal of 12420522 is 22502421.

12420522 is a `hidden beast` number, since 124 + 20 + 522 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12420495 and 12420504.

It is not an unprimeable number, because it can be changed into a prime (12420521) 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 11 ways as a sum of consecutive naturals, for example, 10572 + ... + 11687.

It is an arithmetic number, because the mean of its divisors is an integer number (1157520).

Almost surely, 2^12420522 is an apocalyptic number.

12420522 is an abundant number, since it is smaller than the sum of its proper divisors (15359958).

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

12420522 is a wasteful number, since it uses less digits than its factorization.

12420522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22298 (or 22295 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 12420522 is about 3524.2760958813. The cubic root of 12420522 is about 231.5865232388.

Adding to 12420522 its reverse (22502421), we get a palindrome (34922943).

The spelling of 12420522 in words is "twelve million, four hundred twenty thousand, five hundred twenty-two".