27161745 has 16 divisors (see below), whose sum is σ = 46802112. Its totient is φ = 13371840.

The previous prime is 27161713. The next prime is 27161747. The reversal of 27161745 is 54716172.

It is not a de Polignac number, because 27161745 - 2⁵ = 27161713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27161747) 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 15 ways as a sum of consecutive naturals, for example, 69451 + ... + 69840.

It is an arithmetic number, because the mean of its divisors is an integer number (2925132).

Almost surely, 2^27161745 is an apocalyptic number.

It is an amenable number.

27161745 is a deficient number, since it is larger than the sum of its proper divisors (19640367).

27161745 is a wasteful number, since it uses less digits than its factorization.

27161745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139312.

The product of its digits is 11760, while the sum is 33.

The square root of 27161745 is about 5211.6931030136. The cubic root of 27161745 is about 300.5978632957.

The spelling of 27161745 in words is "twenty-seven million, one hundred sixty-one thousand, seven hundred forty-five".