256246117 has 8 divisors (see below), whose sum is σ = 280675800. Its totient is φ = 232856064.

The previous prime is 256246091. The next prime is 256246121. The reversal of 256246117 is 711642652.

It can be written as a sum of positive squares in 4 ways, for example, as 155725441 + 100520676 = 12479^2 + 10026^2 .

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 256246117 - 2¹¹ = 256244069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256246147) 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, 259392 + ... + 260377.

It is an arithmetic number, because the mean of its divisors is an integer number (35084475).

Almost surely, 2^256246117 is an apocalyptic number.

It is an amenable number.

256246117 is a deficient number, since it is larger than the sum of its proper divisors (24429683).

256246117 is a wasteful number, since it uses less digits than its factorization.

256246117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519815.

The product of its digits is 20160, while the sum is 34.

The square root of 256246117 is about 16007.6893085792. The cubic root of 256246117 is about 635.1638381051.

Adding to 256246117 its reverse (711642652), we get a palindrome (967888769).

The spelling of 256246117 in words is "two hundred fifty-six million, two hundred forty-six thousand, one hundred seventeen".