685572042 has 16 divisors (see below), whose sum is σ = 1384720992. Its totient is φ = 226261200.

The previous prime is 685572031. The next prime is 685572053. The reversal of 685572042 is 240275586.

It is an interprime number because it is at equal distance from previous prime (685572031) and next prime (685572053).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 565048 + ... + 566259.

It is an arithmetic number, because the mean of its divisors is an integer number (86545062).

Almost surely, 2^685572042 is an apocalyptic number.

685572042 is an abundant number, since it is smaller than the sum of its proper divisors (699148950).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

685572042 is a wasteful number, since it uses less digits than its factorization.

685572042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1131413.

The product of its (nonzero) digits is 134400, while the sum is 39.

The square root of 685572042 is about 26183.4306766703. The cubic root of 685572042 is about 881.7612976965.

The spelling of 685572042 in words is "six hundred eighty-five million, five hundred seventy-two thousand, forty-two".