259505285 has 16 divisors (see below), whose sum is σ = 340863600. Its totient is φ = 188490240.

The previous prime is 259505261. The next prime is 259505299. The reversal of 259505285 is 582505952.

It can be written as a sum of positive squares in 8 ways, for example, as 58262689 + 201242596 = 7633^2 + 14186^2 .

It is not a de Polignac number, because 259505285 - 2¹⁶ = 259439749 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28760 + ... + 36689.

It is an arithmetic number, because the mean of its divisors is an integer number (21303975).

Almost surely, 2^259505285 is an apocalyptic number.

It is an amenable number.

259505285 is a deficient number, since it is larger than the sum of its proper divisors (81358315).

259505285 is a wasteful number, since it uses less digits than its factorization.

259505285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65528.

The product of its (nonzero) digits is 180000, while the sum is 41.

The square root of 259505285 is about 16109.1677314503. The cubic root of 259505285 is about 637.8453625281.

The spelling of 259505285 in words is "two hundred fifty-nine million, five hundred five thousand, two hundred eighty-five".