685424042 has 8 divisors (see below), whose sum is σ = 1052046336. Its totient is φ = 334741932.

The previous prime is 685424039. The next prime is 685424053. The reversal of 685424042 is 240424586.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×685424042² = 939612234703235528, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 685423993 and 685424011.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3984938 + ... + 3985109.

It is an arithmetic number, because the mean of its divisors is an integer number (131505792).

Almost surely, 2^685424042 is an apocalyptic number.

685424042 is a deficient number, since it is larger than the sum of its proper divisors (366622294).

685424042 is a wasteful number, since it uses less digits than its factorization.

685424042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7970092.

The product of its (nonzero) digits is 61440, while the sum is 35.

The square root of 685424042 is about 26180.6043092974. The cubic root of 685424042 is about 881.6978421412.

The spelling of 685424042 in words is "six hundred eighty-five million, four hundred twenty-four thousand, forty-two".