681150 has 48 divisors (see below), whose sum is σ = 1785600. Its totient is φ = 171360.

The previous prime is 681137. The next prime is 681151. The reversal of 681150 is 51186.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681151) by changing a digit.

681150 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 23 ways as a sum of consecutive naturals, for example, 2731 + ... + 2969.

It is an arithmetic number, because the mean of its divisors is an integer number (37200).

2⁶⁸¹¹⁵⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 681150, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (892800).

681150 is an abundant number, since it is smaller than the sum of its proper divisors (1104450).

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

681150 is a wasteful number, since it uses less digits than its factorization.

681150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273 (or 268 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 681150 is about 825.3181204845. The cubic root of 681150 is about 87.9861376236.

The spelling of 681150 in words is "six hundred eighty-one thousand, one hundred fifty".