681061 has 2 divisors, whose sum is σ = 681062. Its totient is φ = 681060.

The previous prime is 681049. The next prime is 681067. The reversal of 681061 is 160186.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 630436 + 50625 = 794^2 + 225^2 .

It is a cyclic number.

It is not a de Polignac number, because 681061 - 2¹³ = 672869 is a prime.

681061 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (681067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340530 + 340531.

It is an arithmetic number, because the mean of its divisors is an integer number (340531).

2⁶⁸¹⁰⁶¹ is an apocalyptic number.

It is an amenable number.

681061 is a deficient number, since it is larger than the sum of its proper divisors (1).

681061 is an equidigital number, since it uses as much as digits as its factorization.

681061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 681061 is about 825.2642001202. The cubic root of 681061 is about 87.9823053266.

The spelling of 681061 in words is "six hundred eighty-one thousand, sixty-one".