12220420 has 24 divisors (see below), whose sum is σ = 27014400. Its totient is φ = 4630752.

The previous prime is 12220393. The next prime is 12220421. The reversal of 12220420 is 2402221.

It is a self number, because there is not a number n which added to its sum of digits gives 12220420.

It is not an unprimeable number, because it can be changed into a prime (12220421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15700 + ... + 16459.

It is an arithmetic number, because the mean of its divisors is an integer number (1125600).

Almost surely, 2^12220420 is an apocalyptic number.

12220420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12220420 is an abundant number, since it is smaller than the sum of its proper divisors (14793980).

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

12220420 is a wasteful number, since it uses less digits than its factorization.

12220420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32187 (or 32185 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 12220420 is about 3495.7717316781. The cubic root of 12220420 is about 230.3361185181.

Adding to 12220420 its reverse (2402221), we get a palindrome (14622641).

The spelling of 12220420 in words is "twelve million, two hundred twenty thousand, four hundred twenty".