5981161 has 12 divisors (see below), whose sum is σ = 6534108. Its totient is φ = 5455872.

The previous prime is 5981159. The next prime is 5981167. The reversal of 5981161 is 1611895.

5981161 = T₅₅₀ + T₅₅₁ + ... + T₅₈₆.

It can be written as a sum of positive squares in 6 ways, for example, as 3861225 + 2119936 = 1965^2 + 1456^2 .

It is not a de Polignac number, because 5981161 - 2¹ = 5981159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5981167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23145 + ... + 23401.

It is an arithmetic number, because the mean of its divisors is an integer number (544509).

Almost surely, 2^5981161 is an apocalyptic number.

It is an amenable number.

5981161 is a deficient number, since it is larger than the sum of its proper divisors (552947).

5981161 is a wasteful number, since it uses less digits than its factorization.

5981161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348 (or 311 counting only the distinct ones).

The product of its digits is 2160, while the sum is 31.

The square root of 5981161 is about 2445.6412247098. The cubic root of 5981161 is about 181.5216780286.

The spelling of 5981161 in words is "five million, nine hundred eighty-one thousand, one hundred sixty-one".