12766765 has 24 divisors (see below), whose sum is σ = 17666208. Its totient is φ = 8782560.

The previous prime is 12766763. The next prime is 12766777. The reversal of 12766765 is 56766721.

It is a happy number.

12766765 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12766765 - 2¹ = 12766763 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12766763) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19534 + ... + 20176.

It is an arithmetic number, because the mean of its divisors is an integer number (736092).

Almost surely, 2^12766765 is an apocalyptic number.

It is an amenable number.

12766765 is a deficient number, since it is larger than the sum of its proper divisors (4899443).

12766765 is a wasteful number, since it uses less digits than its factorization.

12766765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697 (or 678 counting only the distinct ones).

The product of its digits is 105840, while the sum is 40.

The square root of 12766765 is about 3573.0610126333. The cubic root of 12766765 is about 233.7187858078.

It can be divided in two parts, 12766 and 765, that multiplied together give a triangular number (9765990 = T₄₄₁₉).

The spelling of 12766765 in words is "twelve million, seven hundred sixty-six thousand, seven hundred sixty-five".