12195765 has 20 divisors (see below), whose sum is σ = 21862764. Its totient is φ = 6504192.

The previous prime is 12195761. The next prime is 12195767. The reversal of 12195765 is 56759121.

It can be written as a sum of positive squares in 2 ways, for example, as 8346321 + 3849444 = 2889^2 + 1962^2 .

It is not a de Polignac number, because 12195765 - 2² = 12195761 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12195761) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 14652 + ... + 15461.

Almost surely, 2^12195765 is an apocalyptic number.

12195765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12195765 is a deficient number, since it is larger than the sum of its proper divisors (9666999).

12195765 is an equidigital number, since it uses as much as digits as its factorization.

12195765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30130 (or 30121 counting only the distinct ones).

The product of its digits is 18900, while the sum is 36.

The square root of 12195765 is about 3492.2435482079. The cubic root of 12195765 is about 230.1811112865.

The spelling of 12195765 in words is "twelve million, one hundred ninety-five thousand, seven hundred sixty-five".