12135575 has 6 divisors (see below), whose sum is σ = 15048144. Its totient is φ = 9708440.

The previous prime is 12135551. The next prime is 12135577. The reversal of 12135575 is 57553121.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-12135575 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12135577) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 242687 + ... + 242736.

It is an arithmetic number, because the mean of its divisors is an integer number (2508024).

Almost surely, 2^12135575 is an apocalyptic number.

12135575 is a deficient number, since it is larger than the sum of its proper divisors (2912569).

12135575 is an equidigital number, since it uses as much as digits as its factorization.

12135575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485433 (or 485428 counting only the distinct ones).

The product of its digits is 5250, while the sum is 29.

The square root of 12135575 is about 3483.6152198542. The cubic root of 12135575 is about 229.8018141539.

Adding to 12135575 its reverse (57553121), we get a palindrome (69688696).

The spelling of 12135575 in words is "twelve million, one hundred thirty-five thousand, five hundred seventy-five".