259381561 has 8 divisors (see below), whose sum is σ = 262422720. Its totient is φ = 256358448.

The previous prime is 259381553. The next prime is 259381571. The reversal of 259381561 is 165183952.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 259381561 - 2³ = 259381553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (259381541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25555 + ... + 34231.

It is an arithmetic number, because the mean of its divisors is an integer number (32802840).

Almost surely, 2^259381561 is an apocalyptic number.

It is an amenable number.

259381561 is a deficient number, since it is larger than the sum of its proper divisors (3041159).

259381561 is a wasteful number, since it uses less digits than its factorization.

259381561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9023.

The product of its digits is 64800, while the sum is 40.

The square root of 259381561 is about 16105.3271000623. The cubic root of 259381561 is about 637.7439781772.

The spelling of 259381561 in words is "two hundred fifty-nine million, three hundred eighty-one thousand, five hundred sixty-one".