5855981 has 2 divisors, whose sum is σ = 5855982. Its totient is φ = 5855980.

The previous prime is 5855977. The next prime is 5856013. The reversal of 5855981 is 1895585.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3575881 + 2280100 = 1891^2 + 1510^2 .

It is a cyclic number.

It is not a de Polignac number, because 5855981 - 2² = 5855977 is a prime.

It is a super-2 number, since 2×5855981² = 68585026944722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5855911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2927990 + 2927991.

It is an arithmetic number, because the mean of its divisors is an integer number (2927991).

Almost surely, 2^5855981 is an apocalyptic number.

It is an amenable number.

5855981 is a deficient number, since it is larger than the sum of its proper divisors (1).

5855981 is an equidigital number, since it uses as much as digits as its factorization.

5855981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72000, while the sum is 41.

The square root of 5855981 is about 2419.9134282036. The cubic root of 5855981 is about 180.2463807117.

The spelling of 5855981 in words is "five million, eight hundred fifty-five thousand, nine hundred eighty-one".