259942142 has 4 divisors (see below), whose sum is σ = 389913216. Its totient is φ = 129971070.

The previous prime is 259942129. The next prime is 259942187. The reversal of 259942142 is 241249952.

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

It is a junction number, because it is equal to n+sod(n) for n = 259942096 and 259942105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64985534 + ... + 64985537.

It is an arithmetic number, because the mean of its divisors is an integer number (97478304).

Almost surely, 2^259942142 is an apocalyptic number.

259942142 is a deficient number, since it is larger than the sum of its proper divisors (129971074).

259942142 is a wasteful number, since it uses less digits than its factorization.

259942142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129971073.

The product of its digits is 51840, while the sum is 38.

The square root of 259942142 is about 16122.7212963569. The cubic root of 259942142 is about 638.2030829207.

The spelling of 259942142 in words is "two hundred fifty-nine million, nine hundred forty-two thousand, one hundred forty-two".