681802 has 16 divisors (see below), whose sum is σ = 1181952. Its totient is φ = 291520.

The previous prime is 681787. The next prime is 681809. The reversal of 681802 is 208186.

681802 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 538 + ... + 1285.

It is an arithmetic number, because the mean of its divisors is an integer number (73872).

2⁶⁸¹⁸⁰² is an apocalyptic number.

681802 is a deficient number, since it is larger than the sum of its proper divisors (500150).

681802 is a wasteful number, since it uses less digits than its factorization.

681802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1853.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 681802 is about 825.7130252091. The cubic root of 681802 is about 88.0142022532.

Adding to 681802 its reverse (208186), we get a palindrome (889988).

The spelling of 681802 in words is "six hundred eighty-one thousand, eight hundred two".