12200765 has 4 divisors (see below), whose sum is σ = 14640924. Its totient is φ = 9760608.

The previous prime is 12200761. The next prime is 12200779. The reversal of 12200765 is 56700221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56700221 = 23 ⋅2465227.

It can be written as a sum of positive squares in 2 ways, for example, as 1304164 + 10896601 = 1142^2 + 3301^2 .

It is a cyclic number.

It is not a de Polignac number, because 12200765 - 2² = 12200761 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12200765.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12200761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1220072 + ... + 1220081.

It is an arithmetic number, because the mean of its divisors is an integer number (3660231).

Almost surely, 2^12200765 is an apocalyptic number.

It is an amenable number.

12200765 is a deficient number, since it is larger than the sum of its proper divisors (2440159).

12200765 is an equidigital number, since it uses as much as digits as its factorization.

12200765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2440158.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 12200765 is about 3492.9593470294. The cubic root of 12200765 is about 230.2125634151.

Adding to 12200765 its reverse (56700221), we get a palindrome (68900986).

The spelling of 12200765 in words is "twelve million, two hundred thousand, seven hundred sixty-five".