2681161 has 4 divisors (see below), whose sum is σ = 3064192. Its totient is φ = 2298132.

The previous prime is 2681141. The next prime is 2681167. The reversal of 2681161 is 1611862.

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 2681161 - 2¹⁷ = 2550089 is a prime.

It is a Duffinian number.

2681161 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2681167) 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, 191505 + ... + 191518.

It is an arithmetic number, because the mean of its divisors is an integer number (766048).

2^2681161 is an apocalyptic number.

It is an amenable number.

2681161 is a deficient number, since it is larger than the sum of its proper divisors (383031).

2681161 is an equidigital number, since it uses as much as digits as its factorization.

2681161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383030.

The product of its digits is 576, while the sum is 25.

The square root of 2681161 is about 1637.4251127914. The cubic root of 2681161 is about 138.9230462715.

The spelling of 2681161 in words is "two million, six hundred eighty-one thousand, one hundred sixty-one".