259961543 has 4 divisors (see below), whose sum is σ = 261308688. Its totient is φ = 258614400.

The previous prime is 259961497. The next prime is 259961549. The reversal of 259961543 is 345169952.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 259961543 - 2¹² = 259957447 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 259961494 and 259961503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (259961549) 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 in 3 ways as a sum of consecutive naturals, for example, 673283 + ... + 673668.

It is an arithmetic number, because the mean of its divisors is an integer number (65327172).

Almost surely, 2^259961543 is an apocalyptic number.

259961543 is a deficient number, since it is larger than the sum of its proper divisors (1347145).

259961543 is a wasteful number, since it uses less digits than its factorization.

259961543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1347144.

The product of its digits is 291600, while the sum is 44.

The square root of 259961543 is about 16123.3229515507. The cubic root of 259961543 is about 638.2189601334.

The spelling of 259961543 in words is "two hundred fifty-nine million, nine hundred sixty-one thousand, five hundred forty-three".