12135665 has 8 divisors (see below), whose sum is σ = 14633088. Its totient is φ = 9661680.

The previous prime is 12135611. The next prime is 12135677. The reversal of 12135665 is 56653121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12135665 - 2¹⁰ = 12134641 is a prime.

It is a Duffinian number.

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, 4697 + ... + 6806.

It is an arithmetic number, because the mean of its divisors is an integer number (1829136).

Almost surely, 2^12135665 is an apocalyptic number.

It is an amenable number.

12135665 is a deficient number, since it is larger than the sum of its proper divisors (2497423).

12135665 is a wasteful number, since it uses less digits than its factorization.

12135665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11719.

The product of its digits is 5400, while the sum is 29.

The square root of 12135665 is about 3483.6281374452. The cubic root of 12135665 is about 229.8023822388.

Adding to 12135665 its reverse (56653121), we get a palindrome (68788786).

The spelling of 12135665 in words is "twelve million, one hundred thirty-five thousand, six hundred sixty-five".