856241329 has 8 divisors (see below), whose sum is σ = 907039080. Its totient is φ = 805491456.

The previous prime is 856241317. The next prime is 856241333. The reversal of 856241329 is 923142658.

It can be written as a sum of positive squares in 4 ways, for example, as 160073104 + 696168225 = 12652^2 + 26385^2 .

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 856241329 - 2⁹ = 856240817 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 856241291 and 856241300.

It is not an unprimeable number, because it can be changed into a prime (851241329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28867 + ... + 50455.

It is an arithmetic number, because the mean of its divisors is an integer number (113379885).

Almost surely, 2^856241329 is an apocalyptic number.

It is an amenable number.

856241329 is a deficient number, since it is larger than the sum of its proper divisors (50797751).

856241329 is a wasteful number, since it uses less digits than its factorization.

856241329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23939.

The product of its digits is 103680, while the sum is 40.

The square root of 856241329 is about 29261.6016137190. The cubic root of 856241329 is about 949.5811002637.

The spelling of 856241329 in words is "eight hundred fifty-six million, two hundred forty-one thousand, three hundred twenty-nine".