12111530 has 16 divisors (see below), whose sum is σ = 21845160. Its totient is φ = 4834752.

The previous prime is 12111527. The next prime is 12111563. The reversal of 12111530 is 3511121.

It can be written as a sum of positive squares in 4 ways, for example, as 11785489 + 326041 = 3433^2 + 571^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5876 + ... + 7664.

Almost surely, 2^12111530 is an apocalyptic number.

12111530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12111530 is a deficient number, since it is larger than the sum of its proper divisors (9733630).

12111530 is a wasteful number, since it uses less digits than its factorization.

12111530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2473.

The product of its (nonzero) digits is 30, while the sum is 14.

The square root of 12111530 is about 3480.1623525347. The cubic root of 12111530 is about 229.6499400690.

Adding to 12111530 its reverse (3511121), we get a palindrome (15622651).

The spelling of 12111530 in words is "twelve million, one hundred eleven thousand, five hundred thirty".