256170841 has 8 divisors (see below), whose sum is σ = 271701864. Its totient is φ = 240691200.

The previous prime is 256170839. The next prime is 256170847. The reversal of 256170841 is 148071652.

It can be written as a sum of positive squares in 4 ways, for example, as 100420441 + 155750400 = 10021^2 + 12480^2 .

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 256170841 - 2¹ = 256170839 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 256170797 and 256170806.

It is not an unprimeable number, because it can be changed into a prime (256170847) 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, 2320 + ... + 22753.

It is an arithmetic number, because the mean of its divisors is an integer number (33962733).

Almost surely, 2^256170841 is an apocalyptic number.

It is an amenable number.

256170841 is a deficient number, since it is larger than the sum of its proper divisors (15531023).

256170841 is a wasteful number, since it uses less digits than its factorization.

256170841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25691.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 256170841 is about 16005.3378908413. The cubic root of 256170841 is about 635.1016358283.

The spelling of 256170841 in words is "two hundred fifty-six million, one hundred seventy thousand, eight hundred forty-one".