27387145 has 4 divisors (see below), whose sum is σ = 32864580. Its totient is φ = 21909712.

The previous prime is 27387091. The next prime is 27387161. The reversal of 27387145 is 54178372.

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 19395216 + 7991929 = 4404^2 + 2827^2 .

It is a cyclic number.

It is not a de Polignac number, because 27387145 - 2⁹ = 27386633 is a prime.

It is a super-2 number, since 2×27387145² = 1500111422502050, which contains 22 as substring.

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, 2738710 + ... + 2738719.

It is an arithmetic number, because the mean of its divisors is an integer number (8216145).

Almost surely, 2^27387145 is an apocalyptic number.

It is an amenable number.

27387145 is a deficient number, since it is larger than the sum of its proper divisors (5477435).

27387145 is an equidigital number, since it uses as much as digits as its factorization.

27387145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5477434.

The product of its digits is 47040, while the sum is 37.

The square root of 27387145 is about 5233.2728765085. The cubic root of 27387145 is about 301.4270711660.

The spelling of 27387145 in words is "twenty-seven million, three hundred eighty-seven thousand, one hundred forty-five".