12135530 has 16 divisors (see below), whose sum is σ = 23829984. Its totient is φ = 4412880.

The previous prime is 12135521. The next prime is 12135551. The reversal of 12135530 is 3553121.

12135530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55052 + ... + 55271.

It is an arithmetic number, because the mean of its divisors is an integer number (1489374).

Almost surely, 2^12135530 is an apocalyptic number.

12135530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12135530 is a deficient number, since it is larger than the sum of its proper divisors (11694454).

12135530 is a wasteful number, since it uses less digits than its factorization.

12135530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110341.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 12135530 is about 3483.6087610408. The cubic root of 12135530 is about 229.8015301104.

Adding to 12135530 its reverse (3553121), we get a palindrome (15688651).

The spelling of 12135530 in words is "twelve million, one hundred thirty-five thousand, five hundred thirty".