2771161 has 4 divisors (see below), whose sum is σ = 2774500. Its totient is φ = 2767824.

The previous prime is 2771159. The next prime is 2771173. The reversal of 2771161 is 1611772.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1904400 + 866761 = 1380^2 + 931^2 .

It is a cyclic number.

It is not a de Polignac number, because 2771161 - 2¹ = 2771159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2771141) 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, 655 + ... + 2443.

It is an arithmetic number, because the mean of its divisors is an integer number (693625).

2^2771161 is an apocalyptic number.

It is an amenable number.

2771161 is a deficient number, since it is larger than the sum of its proper divisors (3339).

2771161 is a wasteful number, since it uses less digits than its factorization.

2771161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3338.

The product of its digits is 588, while the sum is 25.

The square root of 2771161 is about 1664.6804498161. The cubic root of 2771161 is about 140.4604060111.

It can be divided in two parts, 27711 and 61, that added together give a palindrome (27772).

The spelling of 2771161 in words is "two million, seven hundred seventy-one thousand, one hundred sixty-one".