259420081 has 2 divisors, whose sum is σ = 259420082. Its totient is φ = 259420080.

The previous prime is 259420067. The next prime is 259420087. The reversal of 259420081 is 180024952.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 245987856 + 13432225 = 15684^2 + 3665^2 .

It is a cyclic number.

It is not a de Polignac number, because 259420081 - 2²⁷ = 125202353 is a prime.

It is a super-2 number, since 2×259420081² = 134597556852093122, which contains 22 as substring.

It is equal to p_14166049 and since 259420081 and 14166049 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 (259420087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129710040 + 129710041.

It is an arithmetic number, because the mean of its divisors is an integer number (129710041).

Almost surely, 2^259420081 is an apocalyptic number.

It is an amenable number.

259420081 is a deficient number, since it is larger than the sum of its proper divisors (1).

259420081 is an equidigital number, since it uses as much as digits as its factorization.

259420081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 259420081 is about 16106.5229332715. The cubic root of 259420081 is about 637.7755464480.

The spelling of 259420081 in words is "two hundred fifty-nine million, four hundred twenty thousand, eighty-one".