2305161 has 6 divisors (see below), whose sum is σ = 3329690. Its totient is φ = 1536768.

The previous prime is 2305153. The next prime is 2305169. The reversal of 2305161 is 1615032.

It is an interprime number because it is at equal distance from previous prime (2305153) and next prime (2305169).

It can be written as a sum of positive squares in only one way, i.e., 2013561 + 291600 = 1419^2 + 540^2 .

It is not a de Polignac number, because 2305161 - 2³ = 2305153 is a prime.

It is a Duffinian number.

2305161 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2305169) 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, 128056 + ... + 128073.

2^2305161 is an apocalyptic number.

It is an amenable number.

2305161 is a deficient number, since it is larger than the sum of its proper divisors (1024529).

2305161 is a wasteful number, since it uses less digits than its factorization.

2305161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256135 (or 256132 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 2305161 is about 1518.2756666693. The cubic root of 2305161 is about 132.0992710542.

The spelling of 2305161 in words is "two million, three hundred five thousand, one hundred sixty-one".