27642271 has 4 divisors (see below), whose sum is σ = 27744544. Its totient is φ = 27540000.

The previous prime is 27642247. The next prime is 27642281. The reversal of 27642271 is 17224672.

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

It is a cyclic number.

It is not a de Polignac number, because 27642271 - 2⁹ = 27641759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27642281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50730 + ... + 51271.

It is an arithmetic number, because the mean of its divisors is an integer number (6936136).

Almost surely, 2^27642271 is an apocalyptic number.

27642271 is a deficient number, since it is larger than the sum of its proper divisors (102273).

27642271 is a wasteful number, since it uses less digits than its factorization.

27642271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102272.

The product of its digits is 9408, while the sum is 31.

The square root of 27642271 is about 5257.5917490806. The cubic root of 27642271 is about 302.3601648616.

The spelling of 27642271 in words is "twenty-seven million, six hundred forty-two thousand, two hundred seventy-one".