12118420 has 12 divisors (see below), whose sum is σ = 25448724. Its totient is φ = 4847360.

The previous prime is 12118391. The next prime is 12118429. The reversal of 12118420 is 2481121.

It is a happy number.

12118420 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 2471184 + 9647236 = 1572^2 + 3106^2 .

It is a super-2 number, since 2×12118420² = 293712206592800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12118429) 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, 302941 + ... + 302980.

It is an arithmetic number, because the mean of its divisors is an integer number (2120727).

Almost surely, 2^12118420 is an apocalyptic number.

12118420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12118420 is an abundant number, since it is smaller than the sum of its proper divisors (13330304).

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

12118420 is a wasteful number, since it uses less digits than its factorization.

12118420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605930 (or 605928 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 12118420 is about 3481.1521081389. The cubic root of 12118420 is about 229.6934795210.

Adding to 12118420 its reverse (2481121), we get a palindrome (14599541).

The spelling of 12118420 in words is "twelve million, one hundred eighteen thousand, four hundred twenty".