681351 has 12 divisors (see below), whose sum is σ = 999096. Its totient is φ = 412720.

The previous prime is 681341. The next prime is 681361. The reversal of 681351 is 153186.

681351 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (681341) and next prime (681361).

It is not a de Polignac number, because 681351 - 2¹⁰ = 680327 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681311) 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, 576 + ... + 1301.

It is an arithmetic number, because the mean of its divisors is an integer number (83258).

2⁶⁸¹³⁵¹ is an apocalyptic number.

681351 is a deficient number, since it is larger than the sum of its proper divisors (317745).

681351 is a wasteful number, since it uses less digits than its factorization.

681351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1902 (or 1891 counting only the distinct ones).

The product of its digits is 720, while the sum is 24.

The square root of 681351 is about 825.4398827292. The cubic root of 681351 is about 87.9947913584.

The spelling of 681351 in words is "six hundred eighty-one thousand, three hundred fifty-one".