259126561 has 2 divisors, whose sum is σ = 259126562. Its totient is φ = 259126560.

The previous prime is 259126547. The next prime is 259126591. The reversal of 259126561 is 165621952.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 249166225 + 9960336 = 15785^2 + 3156^2 .

It is a cyclic number.

It is not a de Polignac number, because 259126561 - 2⁷ = 259126433 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 259126561.

It is not a weakly prime, because it can be changed into another prime (259126591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129563280 + 129563281.

It is an arithmetic number, because the mean of its divisors is an integer number (129563281).

Almost surely, 2^259126561 is an apocalyptic number.

It is an amenable number.

259126561 is a deficient number, since it is larger than the sum of its proper divisors (1).

259126561 is an equidigital number, since it uses as much as digits as its factorization.

259126561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400, while the sum is 37.

The square root of 259126561 is about 16097.4085181435. The cubic root of 259126561 is about 637.5349193227.

The spelling of 259126561 in words is "two hundred fifty-nine million, one hundred twenty-six thousand, five hundred sixty-one".