259942 has 4 divisors (see below), whose sum is σ = 389916. Its totient is φ = 129970.

The previous prime is 259937. The next prime is 259943. The reversal of 259942 is 249952.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (259943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64984 + ... + 64987.

It is an arithmetic number, because the mean of its divisors is an integer number (97479).

2²⁵⁹⁹⁴² is an apocalyptic number.

259942 is a deficient number, since it is larger than the sum of its proper divisors (129974).

259942 is a wasteful number, since it uses less digits than its factorization.

259942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129973.

The product of its digits is 6480, while the sum is 31.

The square root of 259942 is about 509.8450745079. The cubic root of 259942 is about 63.8202966709.

The spelling of 259942 in words is "two hundred fifty-nine thousand, nine hundred forty-two".