256142105 has 8 divisors (see below), whose sum is σ = 307590792. Its totient is φ = 204766848.

The previous prime is 256142101. The next prime is 256142113. The reversal of 256142105 is 501241652.

256142105 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 23396569 + 232745536 = 4837^2 + 15256^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 256142105 - 2² = 256142101 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256142101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10364 + ... + 24893.

It is an arithmetic number, because the mean of its divisors is an integer number (38448849).

Almost surely, 2^256142105 is an apocalyptic number.

It is an amenable number.

256142105 is a deficient number, since it is larger than the sum of its proper divisors (51448687).

256142105 is a wasteful number, since it uses less digits than its factorization.

256142105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36715.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 256142105 is about 16004.4401651542. The cubic root of 256142105 is about 635.0778874019.

Adding to 256142105 its reverse (501241652), we get a palindrome (757383757).

The spelling of 256142105 in words is "two hundred fifty-six million, one hundred forty-two thousand, one hundred five".