258065081 has 2 divisors, whose sum is σ = 258065082. Its totient is φ = 258065080.

The previous prime is 258065077. The next prime is 258065089. The reversal of 258065081 is 180560852.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 215619856 + 42445225 = 14684^2 + 6515^2 .

It is a cyclic number.

It is not a de Polignac number, because 258065081 - 2² = 258065077 is a prime.

It is a super-2 number, since 2×258065081² = 133195172063073122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (258065089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129032540 + 129032541.

It is an arithmetic number, because the mean of its divisors is an integer number (129032541).

Almost surely, 2^258065081 is an apocalyptic number.

It is an amenable number.

258065081 is a deficient number, since it is larger than the sum of its proper divisors (1).

258065081 is an equidigital number, since it uses as much as digits as its factorization.

258065081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19200, while the sum is 35.

The square root of 258065081 is about 16064.4041595074. The cubic root of 258065081 is about 636.6632002163.

The spelling of 258065081 in words is "two hundred fifty-eight million, sixty-five thousand, eighty-one".