12432220 has 12 divisors (see below), whose sum is σ = 26107704. Its totient is φ = 4972880.

The previous prime is 12432193. The next prime is 12432221. The reversal of 12432220 is 2223421.

It is a junction number, because it is equal to n+sod(n) for n = 12432194 and 12432203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12432221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 310786 + ... + 310825.

It is an arithmetic number, because the mean of its divisors is an integer number (2175642).

Almost surely, 2^12432220 is an apocalyptic number.

12432220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12432220 is an abundant number, since it is smaller than the sum of its proper divisors (13675484).

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

12432220 is a wasteful number, since it uses less digits than its factorization.

12432220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621620 (or 621618 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 12432220 is about 3525.9353369000. The cubic root of 12432220 is about 231.6592053449.

Adding to 12432220 its reverse (2223421), we get a palindrome (14655641).

The spelling of 12432220 in words is "twelve million, four hundred thirty-two thousand, two hundred twenty".