857475961 has 4 divisors (see below), whose sum is σ = 865965924. Its totient is φ = 848986000.

The previous prime is 857475919. The next prime is 857475991. The reversal of 857475961 is 169574758.

857475961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 743925625 + 113550336 = 27275^2 + 10656^2 .

It is a cyclic number.

It is not a de Polignac number, because 857475961 - 2¹³ = 857467769 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 857475899 and 857475908.

It is not an unprimeable number, because it can be changed into a prime (857475991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4244830 + ... + 4245031.

It is an arithmetic number, because the mean of its divisors is an integer number (216491481).

Almost surely, 2^857475961 is an apocalyptic number.

It is an amenable number.

857475961 is a deficient number, since it is larger than the sum of its proper divisors (8489963).

857475961 is a wasteful number, since it uses less digits than its factorization.

857475961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8489962.

The product of its digits is 2116800, while the sum is 52.

The square root of 857475961 is about 29282.6904672368. The cubic root of 857475961 is about 950.0372879178.

The spelling of 857475961 in words is "eight hundred fifty-seven million, four hundred seventy-five thousand, nine hundred sixty-one".