12807765 has 24 divisors (see below), whose sum is σ = 22719840. Its totient is φ = 6670944.

The previous prime is 12807737. The next prime is 12807791. The reversal of 12807765 is 56770821.

It is not a de Polignac number, because 12807765 - 2¹¹ = 12805717 is a prime.

It is a congruent 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 23 ways as a sum of consecutive naturals, for example, 1375 + ... + 5244.

It is an arithmetic number, because the mean of its divisors is an integer number (946660).

Almost surely, 2^12807765 is an apocalyptic number.

12807765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12807765 is a deficient number, since it is larger than the sum of its proper divisors (9912075).

12807765 is a wasteful number, since it uses less digits than its factorization.

12807765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6673 (or 6670 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 12807765 is about 3578.7937912095. The cubic root of 12807765 is about 233.9687115738.

It can be divided in two parts, 1280 and 7765, that added together give a triangular number (9045 = T₁₃₄).

The spelling of 12807765 in words is "twelve million, eight hundred seven thousand, seven hundred sixty-five".