681875 has 10 divisors (see below), whose sum is σ = 852852. Its totient is φ = 545000.

The previous prime is 681841. The next prime is 681883. The reversal of 681875 is 578186.

It is a happy number.

It is not a de Polignac number, because 681875 - 2¹² = 677779 is a prime.

It is a Duffinian 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 9 ways as a sum of consecutive naturals, for example, 80 + ... + 1170.

2⁶⁸¹⁸⁷⁵ is an apocalyptic number.

681875 is a deficient number, since it is larger than the sum of its proper divisors (170977).

681875 is an equidigital number, since it uses as much as digits as its factorization.

681875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111 (or 1096 counting only the distinct ones).

The product of its digits is 13440, while the sum is 35.

The square root of 681875 is about 825.7572282457. The cubic root of 681875 is about 88.0173433448.

The spelling of 681875 in words is "six hundred eighty-one thousand, eight hundred seventy-five".