681271 has 2 divisors, whose sum is σ = 681272. Its totient is φ = 681270.

The previous prime is 681259. The next prime is 681293. The reversal of 681271 is 172186.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 681271 - 2⁹ = 680759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (681221) by changing a digit.

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 as a sum of consecutive naturals, namely, 340635 + 340636.

It is an arithmetic number, because the mean of its divisors is an integer number (340636).

2⁶⁸¹²⁷¹ is an apocalyptic number.

681271 is a deficient number, since it is larger than the sum of its proper divisors (1).

681271 is an equidigital number, since it uses as much as digits as its factorization.

681271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 672, while the sum is 25.

The square root of 681271 is about 825.3914222961. The cubic root of 681271 is about 87.9913472897.

The spelling of 681271 in words is "six hundred eighty-one thousand, two hundred seventy-one".