259170561 has 12 divisors (see below), whose sum is σ = 403154388. Its totient is φ = 159489504.

The previous prime is 259170493. The next prime is 259170577. The reversal of 259170561 is 165071952.

259170561 is a `hidden beast` number, since 2 + 5 + 91 + 7 + 0 + 561 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 64400625 + 194769936 = 8025^2 + 13956^2 .

It is not a de Polignac number, because 259170561 - 2¹⁴ = 259154177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (259100561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1107450 + ... + 1107683.

It is an arithmetic number, because the mean of its divisors is an integer number (33596199).

Almost surely, 2^259170561 is an apocalyptic number.

It is an amenable number.

259170561 is a deficient number, since it is larger than the sum of its proper divisors (143983827).

259170561 is a wasteful number, since it uses less digits than its factorization.

259170561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2215152 (or 2215149 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 36.

The square root of 259170561 is about 16098.7751397428. The cubic root of 259170561 is about 637.5710020111.

It can be divided in two parts, 259 and 170561, that added together give a triangular number (170820 = T₅₈₄).

The spelling of 259170561 in words is "two hundred fifty-nine million, one hundred seventy thousand, five hundred sixty-one".