842429857 has 8 divisors (see below), whose sum is σ = 846995240. Its totient is φ = 837872640.

The previous prime is 842429837. The next prime is 842429869. The reversal of 842429857 is 758924248.

842429857 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 8433216 + 833996641 = 2904^2 + 28879^2 .

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 842429857 - 2¹⁵ = 842397089 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 842429857.

It is not an unprimeable number, because it can be changed into a prime (842429827) 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, 397633 + ... + 399745.

It is an arithmetic number, because the mean of its divisors is an integer number (105874405).

Almost surely, 2^842429857 is an apocalyptic number.

It is an amenable number.

842429857 is a deficient number, since it is larger than the sum of its proper divisors (4565383).

842429857 is a wasteful number, since it uses less digits than its factorization.

842429857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4083.

The product of its digits is 1290240, while the sum is 49.

The square root of 842429857 is about 29024.6422372439. The cubic root of 842429857 is about 944.4477076668.

The spelling of 842429857 in words is "eight hundred forty-two million, four hundred twenty-nine thousand, eight hundred fifty-seven".