8705842 has 4 divisors (see below), whose sum is σ = 13058766. Its totient is φ = 4352920.

The previous prime is 8705831. The next prime is 8705843. The reversal of 8705842 is 2485078.

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

It can be written as a sum of positive squares in only one way, i.e., 8637721 + 68121 = 2939^2 + 261^2 .

It is a junction number, because it is equal to n+sod(n) for n = 8705798 and 8705807.

It is not an unprimeable number, because it can be changed into a prime (8705843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2176459 + ... + 2176462.

Almost surely, 2^8705842 is an apocalyptic number.

8705842 is a deficient number, since it is larger than the sum of its proper divisors (4352924).

8705842 is a wasteful number, since it uses less digits than its factorization.

8705842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4352923.

The product of its (nonzero) digits is 17920, while the sum is 34.

The square root of 8705842 is about 2950.5663863062. The cubic root of 8705842 is about 205.7170369543.

The spelling of 8705842 in words is "eight million, seven hundred five thousand, eight hundred forty-two".