259439942 has 4 divisors (see below), whose sum is σ = 389159916. Its totient is φ = 129719970.

The previous prime is 259439909. The next prime is 259439951. The reversal of 259439942 is 249934952.

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

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, 64859984 + ... + 64859987.

It is an arithmetic number, because the mean of its divisors is an integer number (97289979).

Almost surely, 2^259439942 is an apocalyptic number.

259439942 is a deficient number, since it is larger than the sum of its proper divisors (129719974).

259439942 is a wasteful number, since it uses less digits than its factorization.

259439942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129719973.

The product of its digits is 699840, while the sum is 47.

The square root of 259439942 is about 16107.1394729170. The cubic root of 259439942 is about 637.7918218996.

The spelling of 259439942 in words is "two hundred fifty-nine million, four hundred thirty-nine thousand, nine hundred forty-two".