395681 has 8 divisors (see below), whose sum is σ = 465024. Its totient is φ = 331920.

The previous prime is 395677. The next prime is 395687. The reversal of 395681 is 186593.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 395681 - 2² = 395677 is a prime.

It is a super-2 number, since 2×395681² = 313126907522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 395681.

It is not an unprimeable number, because it can be changed into a prime (395687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1241 + ... + 1526.

It is an arithmetic number, because the mean of its divisors is an integer number (58128).

2³⁹⁵⁶⁸¹ is an apocalyptic number.

It is an amenable number.

395681 is a deficient number, since it is larger than the sum of its proper divisors (69343).

395681 is a wasteful number, since it uses less digits than its factorization.

395681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2791.

The product of its digits is 6480, while the sum is 32.

The square root of 395681 is about 629.0317956988. The cubic root of 395681 is about 73.4144808795.

The spelling of 395681 in words is "three hundred ninety-five thousand, six hundred eighty-one".