12387765 has 16 divisors (see below), whose sum is σ = 21345408. Its totient is φ = 6098496.

The previous prime is 12387763. The next prime is 12387769. The reversal of 12387765 is 56778321.

12387765 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12387765 - 2¹ = 12387763 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12387761) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 31569 + ... + 31958.

It is an arithmetic number, because the mean of its divisors is an integer number (1334088).

Almost surely, 2^12387765 is an apocalyptic number.

12387765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12387765 is a deficient number, since it is larger than the sum of its proper divisors (8957643).

12387765 is a wasteful number, since it uses less digits than its factorization.

12387765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63548.

The product of its digits is 70560, while the sum is 39.

The square root of 12387765 is about 3519.6256903256. The cubic root of 12387765 is about 231.3827540648.

The spelling of 12387765 in words is "twelve million, three hundred eighty-seven thousand, seven hundred sixty-five".