256306142 has 8 divisors (see below), whose sum is σ = 384534432. Its totient is φ = 128128000.

The previous prime is 256306133. The next prime is 256306157. The reversal of 256306142 is 241603652.

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 (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5342 + ... + 23262.

It is an arithmetic number, because the mean of its divisors is an integer number (48066804).

Almost surely, 2^256306142 is an apocalyptic number.

256306142 is a deficient number, since it is larger than the sum of its proper divisors (128228290).

256306142 is a wasteful number, since it uses less digits than its factorization.

256306142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25074.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 256306142 is about 16009.5640790123. The cubic root of 256306142 is about 635.2134294034.

Adding to 256306142 its reverse (241603652), we get a palindrome (497909794).

The spelling of 256306142 in words is "two hundred fifty-six million, three hundred six thousand, one hundred forty-two".