306161 has 4 divisors (see below), whose sum is σ = 307824. Its totient is φ = 304500.

The previous prime is 306157. The next prime is 306167. The reversal of 306161 is 161603.

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 306161 - 2² = 306157 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 306161.

It is not an unprimeable number, because it can be changed into a prime (306167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 515 + ... + 936.

It is an arithmetic number, because the mean of its divisors is an integer number (76956).

2³⁰⁶¹⁶¹ is an apocalyptic number.

It is an amenable number.

306161 is a deficient number, since it is larger than the sum of its proper divisors (1663).

306161 is a wasteful number, since it uses less digits than its factorization.

306161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1662.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 306161 is about 553.3181724831. The cubic root of 306161 is about 67.3984572902.

Adding to 306161 its reverse (161603), we get a palindrome (467764).

The spelling of 306161 in words is "three hundred six thousand, one hundred sixty-one".