681042 has 16 divisors (see below), whose sum is σ = 1370880. Its totient is φ = 225552.

The previous prime is 681041. The next prime is 681047. The reversal of 681042 is 240186.

681042 is nontrivially palindromic in base 7.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 681042.

It is not an unprimeable number, because it can be changed into a prime (681041) 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, 1084 + ... + 1592.

It is an arithmetic number, because the mean of its divisors is an integer number (85680).

2⁶⁸¹⁰⁴² is an apocalyptic number.

681042 is an abundant number, since it is smaller than the sum of its proper divisors (689838).

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

681042 is a wasteful number, since it uses less digits than its factorization.

681042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 681042 is about 825.2526885748. The cubic root of 681042 is about 87.9814871525.

The spelling of 681042 in words is "six hundred eighty-one thousand, forty-two".