256100242 has 4 divisors (see below), whose sum is σ = 384150366. Its totient is φ = 128050120.

The previous prime is 256100233. The next prime is 256100263. The reversal of 256100242 is 242001652.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 146918641 + 109181601 = 12121^2 + 10449^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64025059 + ... + 64025062.

Almost surely, 2^256100242 is an apocalyptic number.

256100242 is a deficient number, since it is larger than the sum of its proper divisors (128050124).

256100242 is a wasteful number, since it uses less digits than its factorization.

256100242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128050123.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 256100242 is about 16003.1322559054. The cubic root of 256100242 is about 635.0432871890.

Adding to 256100242 its reverse (242001652), we get a palindrome (498101894).

The spelling of 256100242 in words is "two hundred fifty-six million, one hundred thousand, two hundred forty-two".