681355 has 16 divisors (see below), whose sum is σ = 875520. Its totient is φ = 508032.

The previous prime is 681341. The next prime is 681361. The reversal of 681355 is 553186.

681355 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 681355 - 2¹⁷ = 550283 is a prime.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5302 + ... + 5428.

It is an arithmetic number, because the mean of its divisors is an integer number (54720).

2⁶⁸¹³⁵⁵ is an apocalyptic number.

681355 is a deficient number, since it is larger than the sum of its proper divisors (194165).

681355 is a wasteful number, since it uses less digits than its factorization.

681355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198.

The product of its digits is 3600, while the sum is 28.

The square root of 681355 is about 825.4423056762. The cubic root of 681355 is about 87.9949635547.

The spelling of 681355 in words is "six hundred eighty-one thousand, three hundred fifty-five".