12243620 has 12 divisors (see below), whose sum is σ = 25711644. Its totient is φ = 4897440.

The previous prime is 12243611. The next prime is 12243661. The reversal of 12243620 is 2634221.

12243620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 7054336 + 5189284 = 2656^2 + 2278^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 612181 = 12243620 / (1 + 2 + 2 + 4 + 3 + 6 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 12243592 and 12243601.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 306071 + ... + 306110.

It is an arithmetic number, because the mean of its divisors is an integer number (2142637).

Almost surely, 2^12243620 is an apocalyptic number.

12243620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12243620 is an abundant number, since it is smaller than the sum of its proper divisors (13468024).

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

12243620 is a wasteful number, since it uses less digits than its factorization.

12243620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612190 (or 612188 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 12243620 is about 3499.0884527259. The cubic root of 12243620 is about 230.4817878117.

Adding to 12243620 its reverse (2634221), we get a palindrome (14877841).

The spelling of 12243620 in words is "twelve million, two hundred forty-three thousand, six hundred twenty".