12118530 has 16 divisors (see below), whose sum is σ = 29084544. Its totient is φ = 3231600.

The previous prime is 12118529. The next prime is 12118537. The reversal of 12118530 is 3581121.

It is a junction number, because it is equal to n+sod(n) for n = 12118497 and 12118506.

It is not an unprimeable number, because it can be changed into a prime (12118537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201946 + ... + 202005.

It is an arithmetic number, because the mean of its divisors is an integer number (1817784).

Almost surely, 2^12118530 is an apocalyptic number.

12118530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12118530 is an abundant number, since it is smaller than the sum of its proper divisors (16966014).

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

12118530 is a wasteful number, since it uses less digits than its factorization.

12118530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403961.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 12118530 is about 3481.1679074701. The cubic root of 12118530 is about 229.6941745018.

Adding to 12118530 its reverse (3581121), we get a palindrome (15699651).

The spelling of 12118530 in words is "twelve million, one hundred eighteen thousand, five hundred thirty".