681741 has 12 divisors (see below), whose sum is σ = 992160. Its totient is φ = 451080.

The previous prime is 681731. The next prime is 681763. The reversal of 681741 is 147186.

It is a happy number.

681741 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 681741 - 2⁶ = 681677 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681731) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1720 + ... + 2078.

It is an arithmetic number, because the mean of its divisors is an integer number (82680).

2⁶⁸¹⁷⁴¹ is an apocalyptic number.

It is an amenable number.

681741 is a deficient number, since it is larger than the sum of its proper divisors (310419).

681741 is a wasteful number, since it uses less digits than its factorization.

681741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576 (or 573 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 681741 is about 825.6760866102. The cubic root of 681741 is about 88.0115773336.

The spelling of 681741 in words is "six hundred eighty-one thousand, seven hundred forty-one".