681041 has 2 divisors, whose sum is σ = 681042. Its totient is φ = 681040.

The previous prime is 681019. The next prime is 681047. The reversal of 681041 is 140186.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 409600 + 271441 = 640^2 + 521^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-681041 is a prime.

It is not a weakly prime, because it can be changed into another prime (681047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340520 + 340521.

It is an arithmetic number, because the mean of its divisors is an integer number (340521).

2⁶⁸¹⁰⁴¹ is an apocalyptic number.

It is an amenable number.

681041 is a deficient number, since it is larger than the sum of its proper divisors (1).

681041 is an equidigital number, since it uses as much as digits as its factorization.

681041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 681041 is about 825.2520826996. The cubic root of 681041 is about 87.9814440903.

The spelling of 681041 in words is "six hundred eighty-one thousand, forty-one".