12220524 has 24 divisors (see below), whose sum is σ = 31683120. Its totient is φ = 4073472.

The previous prime is 12220519. The next prime is 12220529. The reversal of 12220524 is 42502221.

12220524 is a `hidden beast` number, since 122 + 20 + 524 = 666.

It is an interprime number because it is at equal distance from previous prime (12220519) and next prime (12220529).

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 = 12220497 and 12220506.

It is not an unprimeable number, because it can be changed into a prime (12220529) 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 7 ways as a sum of consecutive naturals, for example, 56469 + ... + 56684.

It is an arithmetic number, because the mean of its divisors is an integer number (1320130).

Almost surely, 2^12220524 is an apocalyptic number.

It is an amenable number.

12220524 is an abundant number, since it is smaller than the sum of its proper divisors (19462596).

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

12220524 is a wasteful number, since it uses less digits than its factorization.

12220524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113166 (or 113158 counting only the distinct ones).

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

The square root of 12220524 is about 3495.7866067596. The cubic root of 12220524 is about 230.3367719296.

Adding to 12220524 its reverse (42502221), we get a palindrome (54722745).

The spelling of 12220524 in words is "twelve million, two hundred twenty thousand, five hundred twenty-four".