12665105 has 8 divisors (see below), whose sum is σ = 15569064. Its totient is φ = 9884800.

The previous prime is 12665087. The next prime is 12665123. The reversal of 12665105 is 50156621.

It is an interprime number because it is at equal distance from previous prime (12665087) and next prime (12665123).

It can be written as a sum of positive squares in 4 ways, for example, as 1098304 + 11566801 = 1048^2 + 3401^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12665105 - 2⁶ = 12665041 is a prime.

It is a super-2 number, since 2×12665105² = 320809769322050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30686 + ... + 31095.

It is an arithmetic number, because the mean of its divisors is an integer number (1946133).

Almost surely, 2^12665105 is an apocalyptic number.

It is an amenable number.

12665105 is a deficient number, since it is larger than the sum of its proper divisors (2903959).

12665105 is an equidigital number, since it uses as much as digits as its factorization.

12665105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61827.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 12665105 is about 3558.8066820214. The cubic root of 12665105 is about 233.0967749924.

The spelling of 12665105 in words is "twelve million, six hundred sixty-five thousand, one hundred five".