259646742 has 64 divisors (see below), whose sum is σ = 614880000. Its totient is φ = 80979264.

The previous prime is 259646719. The next prime is 259646759. The reversal of 259646742 is 247646952.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 83634 + ... + 86682.

It is an arithmetic number, because the mean of its divisors is an integer number (9607500).

Almost surely, 2^259646742 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 259646742, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (307440000).

259646742 is an abundant number, since it is smaller than the sum of its proper divisors (355233258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

259646742 is a wasteful number, since it uses less digits than its factorization.

259646742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3162 (or 3156 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The square root of 259646742 is about 16113.5577077193. The cubic root of 259646742 is about 637.9612385265.

The spelling of 259646742 in words is "two hundred fifty-nine million, six hundred forty-six thousand, seven hundred forty-two".