12170220 has 48 divisors (see below), whose sum is σ = 35562240. Its totient is φ = 3103936.

The previous prime is 12170219. The next prime is 12170233. The reversal of 12170220 is 2207121.

It is a super-2 number, since 2×12170220² = 296228509696800, which contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 12170220.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3030 + ... + 5789.

It is an arithmetic number, because the mean of its divisors is an integer number (740880).

Almost surely, 2^12170220 is an apocalyptic number.

12170220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12170220 is an abundant number, since it is smaller than the sum of its proper divisors (23392020).

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

12170220 is a wasteful number, since it uses less digits than its factorization.

12170220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8854 (or 8852 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 15.

The square root of 12170220 is about 3488.5842400607. The cubic root of 12170220 is about 230.0202880654.

Adding to 12170220 its reverse (2207121), we get a palindrome (14377341).

The spelling of 12170220 in words is "twelve million, one hundred seventy thousand, two hundred twenty".