681156 has 96 divisors (see below), whose sum is σ = 2177280. Its totient is φ = 179712.

The previous prime is 681151. The next prime is 681167. The reversal of 681156 is 651186.

It is a Harshad number since it is a multiple of its sum of digits (27).

Its product of digits (1440) is a multiple of the sum of its prime factors (90).

It is a zygodrome in base 6.

It is a congruent number.

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

681156 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12826 + ... + 12878.

It is an arithmetic number, because the mean of its divisors is an integer number (22680).

2⁶⁸¹¹⁵⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 681156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1088640).

681156 is an abundant number, since it is smaller than the sum of its proper divisors (1496124).

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

681156 is a wasteful number, since it uses less digits than its factorization.

681156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90 (or 82 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 681156 is about 825.3217554384. The cubic root of 681156 is about 87.9863959687.

It can be divided in two parts, 68115 and 6, that added together give a square (68121 = 261²).

The spelling of 681156 in words is "six hundred eighty-one thousand, one hundred fifty-six".