681575 has 12 divisors (see below), whose sum is σ = 855600. Its totient is φ = 538560.

The previous prime is 681563. The next prime is 681589. The reversal of 681575 is 575186.

It is a de Polignac number, because none of the positive numbers 2^k-681575 is a prime.

It is a congruent number.

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 3326 + ... + 3524.

It is an arithmetic number, because the mean of its divisors is an integer number (71300).

2⁶⁸¹⁵⁷⁵ is an apocalyptic number.

681575 is a deficient number, since it is larger than the sum of its proper divisors (174025).

681575 is a wasteful number, since it uses less digits than its factorization.

681575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346 (or 341 counting only the distinct ones).

The product of its digits is 8400, while the sum is 32.

The square root of 681575 is about 825.5755568087. The cubic root of 681575 is about 88.0044333166.

The spelling of 681575 in words is "six hundred eighty-one thousand, five hundred seventy-five".