12641165 has 4 divisors (see below), whose sum is σ = 15169404. Its totient is φ = 10112928.

The previous prime is 12641147. The next prime is 12641171. The reversal of 12641165 is 56114621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8031556 + 4609609 = 2834^2 + 2147^2 .

It is a cyclic number.

It is not a de Polignac number, because 12641165 - 2¹⁰ = 12640141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1264112 + ... + 1264121.

It is an arithmetic number, because the mean of its divisors is an integer number (3792351).

Almost surely, 2^12641165 is an apocalyptic number.

It is an amenable number.

12641165 is a deficient number, since it is larger than the sum of its proper divisors (2528239).

12641165 is an equidigital number, since it uses as much as digits as its factorization.

12641165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2528238.

The product of its digits is 1440, while the sum is 26.

The square root of 12641165 is about 3555.4416040768. The cubic root of 12641165 is about 232.9498132805.

Adding to 12641165 its reverse (56114621), we get a palindrome (68755786).

The spelling of 12641165 in words is "twelve million, six hundred forty-one thousand, one hundred sixty-five".