681702 has 16 divisors (see below), whose sum is σ = 1558272. Its totient is φ = 194760.

The previous prime is 681689. The next prime is 681719. The reversal of 681702 is 207186.

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 681702.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 8074 + ... + 8157.

It is an arithmetic number, because the mean of its divisors is an integer number (97392).

2⁶⁸¹⁷⁰² is an apocalyptic number.

681702 is an abundant number, since it is smaller than the sum of its proper divisors (876570).

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

681702 is a wasteful number, since it uses less digits than its factorization.

681702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16243.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 681702 is about 825.6524692629. The cubic root of 681702 is about 88.0098990242.

Adding to 681702 its reverse (207186), we get a palindrome (888888).

It can be divided in two parts, 68 and 1702, that added together give a triangular number (1770 = T₅₉).

The spelling of 681702 in words is "six hundred eighty-one thousand, seven hundred two".