12220530 has 32 divisors (see below), whose sum is σ = 33519744. Its totient is φ = 2793216.

The previous prime is 12220529. The next prime is 12220531. The reversal of 12220530 is 3502221.

It is an interprime number because it is at equal distance from previous prime (12220529) and next prime (12220531).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (12220531) 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 15 ways as a sum of consecutive naturals, for example, 28887 + ... + 29306.

It is an arithmetic number, because the mean of its divisors is an integer number (1047492).

Almost surely, 2^12220530 is an apocalyptic number.

12220530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12220530 is an abundant number, since it is smaller than the sum of its proper divisors (21299214).

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

12220530 is a wasteful number, since it uses less digits than its factorization.

12220530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58210.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 12220530 is about 3495.7874649355. The cubic root of 12220530 is about 230.3368096263.

Adding to 12220530 its reverse (3502221), we get a palindrome (15722751).

The spelling of 12220530 in words is "twelve million, two hundred twenty thousand, five hundred thirty".