256279742 has 8 divisors (see below), whose sum is σ = 393359736. Its totient is φ = 125159832.

The previous prime is 256279739. The next prime is 256279753. The reversal of 256279742 is 247972652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 256279693 and 256279702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1489913 + ... + 1490084.

It is an arithmetic number, because the mean of its divisors is an integer number (49169967).

Almost surely, 2^256279742 is an apocalyptic number.

256279742 is a deficient number, since it is larger than the sum of its proper divisors (137079994).

256279742 is a wasteful number, since it uses less digits than its factorization.

256279742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2980042.

The product of its digits is 423360, while the sum is 44.

The square root of 256279742 is about 16008.7395506330. The cubic root of 256279742 is about 635.1916192740.

The spelling of 256279742 in words is "two hundred fifty-six million, two hundred seventy-nine thousand, seven hundred forty-two".