12163765 has 16 divisors (see below), whose sum is σ = 15011568. Its totient is φ = 9458176.

The previous prime is 12163747. The next prime is 12163769. The reversal of 12163765 is 56736121.

It can be written as a sum of positive squares in 8 ways, for example, as 508369 + 11655396 = 713^2 + 3414^2 .

It is a cyclic number.

It is not a de Polignac number, because 12163765 - 2¹¹ = 12161717 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 (12163769) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52089 + ... + 52321.

It is an arithmetic number, because the mean of its divisors is an integer number (938223).

Almost surely, 2^12163765 is an apocalyptic number.

It is an amenable number.

12163765 is a deficient number, since it is larger than the sum of its proper divisors (2847803).

12163765 is a wasteful number, since it uses less digits than its factorization.

12163765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488.

The product of its digits is 7560, while the sum is 31.

The square root of 12163765 is about 3487.6589569509. The cubic root of 12163765 is about 229.9796138201.

Adding to 12163765 its reverse (56736121), we get a palindrome (68899886).

The spelling of 12163765 in words is "twelve million, one hundred sixty-three thousand, seven hundred sixty-five".