27942165 has 20 divisors (see below), whose sum is σ = 50089644. Its totient is φ = 14902272.

The previous prime is 27942163. The next prime is 27942181. The reversal of 27942165 is 56124972.

It can be written as a sum of positive squares in 2 ways, for example, as 6625476 + 21316689 = 2574^2 + 4617^2 .

It is not a de Polignac number, because 27942165 - 2¹ = 27942163 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27942163) 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 19 ways as a sum of consecutive naturals, for example, 34092 + ... + 34901.

Almost surely, 2^27942165 is an apocalyptic number.

It is an amenable number.

27942165 is a deficient number, since it is larger than the sum of its proper divisors (22147479).

27942165 is an equidigital number, since it uses as much as digits as its factorization.

27942165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69010 (or 69001 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 27942165 is about 5286.0349034035. The cubic root of 27942165 is about 303.4496803074.

The spelling of 27942165 in words is "twenty-seven million, nine hundred forty-two thousand, one hundred sixty-five".