27142881 has 4 divisors (see below), whose sum is σ = 36190512. Its totient is φ = 18095252.

The previous prime is 27142873. The next prime is 27142901. The reversal of 27142881 is 18824172.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27142881 - 2³ = 27142873 is a prime.

It is a super-2 number, since 2×27142881² = 1473471977960322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27142481) 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 3 ways as a sum of consecutive naturals, for example, 4523811 + ... + 4523816.

It is an arithmetic number, because the mean of its divisors is an integer number (9047628).

Almost surely, 2^27142881 is an apocalyptic number.

It is an amenable number.

27142881 is a deficient number, since it is larger than the sum of its proper divisors (9047631).

27142881 is an equidigital number, since it uses as much as digits as its factorization.

27142881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9047630.

The product of its digits is 7168, while the sum is 33.

The square root of 27142881 is about 5209.8830121222. The cubic root of 27142881 is about 300.5282581540.

The spelling of 27142881 in words is "twenty-seven million, one hundred forty-two thousand, eight hundred eighty-one".