256386142 has 8 divisors (see below), whose sum is σ = 385345296. Its totient is φ = 127937712.

The previous prime is 256386139. The next prime is 256386191. The reversal of 256386142 is 241683652.

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

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 126423 + ... + 128434.

It is an arithmetic number, because the mean of its divisors is an integer number (48168162).

Almost surely, 2^256386142 is an apocalyptic number.

256386142 is a deficient number, since it is larger than the sum of its proper divisors (128959154).

256386142 is a wasteful number, since it uses less digits than its factorization.

256386142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255362.

The product of its digits is 69120, while the sum is 37.

The square root of 256386142 is about 16012.0623905854. The cubic root of 256386142 is about 635.2795115604.

The spelling of 256386142 in words is "two hundred fifty-six million, three hundred eighty-six thousand, one hundred forty-two".