12172765 has 32 divisors (see below), whose sum is σ = 17293824. Its totient is φ = 8125440.

The previous prime is 12172763. The next prime is 12172789. The reversal of 12172765 is 56727121.

It is not a de Polignac number, because 12172765 - 2¹ = 12172763 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12172763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43807 + ... + 44083.

It is an arithmetic number, because the mean of its divisors is an integer number (540432).

Almost surely, 2^12172765 is an apocalyptic number.

It is an amenable number.

12172765 is a deficient number, since it is larger than the sum of its proper divisors (5121059).

12172765 is a wasteful number, since it uses less digits than its factorization.

12172765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357.

The product of its digits is 5880, while the sum is 31.

The square root of 12172765 is about 3488.9489821435. The cubic root of 12172765 is about 230.0363206661.

Adding to 12172765 its reverse (56727121), we get a palindrome (68899886).

The spelling of 12172765 in words is "twelve million, one hundred seventy-two thousand, seven hundred sixty-five".