12455220 has 48 divisors (see below), whose sum is σ = 36929088. Its totient is φ = 3125760.

The previous prime is 12455189. The next prime is 12455221. The reversal of 12455220 is 2255421.

It is a happy number.

12455220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12455221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5086 + ... + 7125.

It is an arithmetic number, because the mean of its divisors is an integer number (769356).

Almost surely, 2^12455220 is an apocalyptic number.

12455220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12455220 is an abundant number, since it is smaller than the sum of its proper divisors (24473868).

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

12455220 is a wasteful number, since it uses less digits than its factorization.

12455220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12240 (or 12238 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 12455220 is about 3529.1953757195. The cubic root of 12455220 is about 231.8019762884.

The spelling of 12455220 in words is "twelve million, four hundred fifty-five thousand, two hundred twenty".