259491143 has 4 divisors (see below), whose sum is σ = 260577120. Its totient is φ = 258405168.

The previous prime is 259491137. The next prime is 259491149. The reversal of 259491143 is 341194952.

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

It is an interprime number because it is at equal distance from previous prime (259491137) and next prime (259491149).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-259491143 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 259491097 and 259491106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (259491149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 542630 + ... + 543107.

It is an arithmetic number, because the mean of its divisors is an integer number (65144280).

Almost surely, 2^259491143 is an apocalyptic number.

259491143 is a deficient number, since it is larger than the sum of its proper divisors (1085977).

259491143 is a wasteful number, since it uses less digits than its factorization.

259491143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1085976.

The product of its digits is 38880, while the sum is 38.

The square root of 259491143 is about 16108.7287828680. The cubic root of 259491143 is about 637.8337756440.

The spelling of 259491143 in words is "two hundred fifty-nine million, four hundred ninety-one thousand, one hundred forty-three".