591161 has 2 divisors, whose sum is σ = 591162. Its totient is φ = 591160.

The previous prime is 591137. The next prime is 591163. The reversal of 591161 is 161195.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 525625 + 65536 = 725^2 + 256^2 .

It is a cyclic number.

It is not a de Polignac number, because 591161 - 2¹⁰ = 590137 is a prime.

Together with 591163, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p₄₈₄₃₄ and since 591161 and 48434 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (591163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 295580 + 295581.

It is an arithmetic number, because the mean of its divisors is an integer number (295581).

2⁵⁹¹¹⁶¹ is an apocalyptic number.

It is an amenable number.

591161 is a deficient number, since it is larger than the sum of its proper divisors (1).

591161 is an equidigital number, since it uses as much as digits as its factorization.

591161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 270, while the sum is 23.

The square root of 591161 is about 768.8699499915. The cubic root of 591161 is about 83.9270436075.

The spelling of 591161 in words is "five hundred ninety-one thousand, one hundred sixty-one".