685124542 has 8 divisors (see below), whose sum is σ = 1029381696. Its totient is φ = 341997312.

The previous prime is 685124527. The next prime is 685124543. The reversal of 685124542 is 245421586.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685124543) by changing a digit.

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, 280963 + ... + 283390.

It is an arithmetic number, because the mean of its divisors is an integer number (128672712).

Almost surely, 2^685124542 is an apocalyptic number.

685124542 is a deficient number, since it is larger than the sum of its proper divisors (344257154).

685124542 is a wasteful number, since it uses less digits than its factorization.

685124542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564962.

The product of its digits is 76800, while the sum is 37.

The square root of 685124542 is about 26174.8838010792. The cubic root of 685124542 is about 881.5694024411.

The spelling of 685124542 in words is "six hundred eighty-five million, one hundred twenty-four thousand, five hundred forty-two".