27012161 has 6 divisors (see below), whose sum is σ = 29691186. Its totient is φ = 24556400.

The previous prime is 27012157. The next prime is 27012179. The reversal of 27012161 is 16121072.

It can be written as a sum of positive squares in only one way, i.e., 19749136 + 7263025 = 4444^2 + 2695^2 .

It is not a de Polignac number, because 27012161 - 2² = 27012157 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27012131) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 111500 + ... + 111741.

It is an arithmetic number, because the mean of its divisors is an integer number (4948531).

Almost surely, 2^27012161 is an apocalyptic number.

It is an amenable number.

27012161 is a deficient number, since it is larger than the sum of its proper divisors (2679025).

27012161 is a wasteful number, since it uses less digits than its factorization.

27012161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223263 (or 223252 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 27012161 is about 5197.3224837410. The cubic root of 27012161 is about 300.0450339802.

The spelling of 27012161 in words is "twenty-seven million, twelve thousand, one hundred sixty-one".