27130405 has 8 divisors (see below), whose sum is σ = 32585112. Its totient is φ = 21685248.

The previous prime is 27130393. The next prime is 27130429. The reversal of 27130405 is 50403172.

It can be written as a sum of positive squares in 4 ways, for example, as 1181569 + 25948836 = 1087^2 + 5094^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 27130405 - 2⁵ = 27130373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7917 + ... + 10813.

It is an arithmetic number, because the mean of its divisors is an integer number (4073139).

Almost surely, 2^27130405 is an apocalyptic number.

It is an amenable number.

27130405 is a deficient number, since it is larger than the sum of its proper divisors (5454707).

27130405 is a wasteful number, since it uses less digits than its factorization.

27130405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4775.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 27130405 is about 5208.6855347583. The cubic root of 27130405 is about 300.4822059908.

Adding to 27130405 its reverse (50403172), we get a palindrome (77533577).

The spelling of 27130405 in words is "twenty-seven million, one hundred thirty thousand, four hundred five".