12765145 has 16 divisors (see below), whose sum is σ = 15925392. Its totient is φ = 9815040.

The previous prime is 12765143. The next prime is 12765157. The reversal of 12765145 is 54156721.

It can be written as a sum of positive squares in 8 ways, for example, as 3956121 + 8809024 = 1989^2 + 2968^2 .

It is not a de Polignac number, because 12765145 - 2¹ = 12765143 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12765143) 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, 14539 + ... + 15391.

It is an arithmetic number, because the mean of its divisors is an integer number (995337).

Almost surely, 2^12765145 is an apocalyptic number.

It is an amenable number.

12765145 is a deficient number, since it is larger than the sum of its proper divisors (3160247).

12765145 is an equidigital number, since it uses as much as digits as its factorization.

12765145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972.

The product of its digits is 8400, while the sum is 31.

The square root of 12765145 is about 3572.8343090605. The cubic root of 12765145 is about 233.7088997104.

The spelling of 12765145 in words is "twelve million, seven hundred sixty-five thousand, one hundred forty-five".