307161 has 6 divisors (see below), whose sum is σ = 443690. Its totient is φ = 204768.

The previous prime is 307147. The next prime is 307163. The reversal of 307161 is 161703.

It can be written as a sum of positive squares in only one way, i.e., 207936 + 99225 = 456^2 + 315^2 .

It is not a de Polignac number, because 307161 - 2⁵ = 307129 is a prime.

It is a Duffinian number.

307161 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (307163) 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, 17056 + ... + 17073.

2³⁰⁷¹⁶¹ is an apocalyptic number.

It is an amenable number.

307161 is a deficient number, since it is larger than the sum of its proper divisors (136529).

307161 is a wasteful number, since it uses less digits than its factorization.

307161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34135 (or 34132 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 18.

The square root of 307161 is about 554.2210750233. The cubic root of 307161 is about 67.4717577323.

Adding to 307161 its reverse (161703), we get a palindrome (468864).

The spelling of 307161 in words is "three hundred seven thousand, one hundred sixty-one".