671795 has 4 divisors (see below), whose sum is σ = 806160. Its totient is φ = 537432.

The previous prime is 671791. The next prime is 671831. The reversal of 671795 is 597176.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 671795 - 2² = 671791 is a prime.

It is a plaindrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (671791) 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 3 ways as a sum of consecutive naturals, for example, 67175 + ... + 67184.

It is an arithmetic number, because the mean of its divisors is an integer number (201540).

2⁶⁷¹⁷⁹⁵ is an apocalyptic number.

671795 is a deficient number, since it is larger than the sum of its proper divisors (134365).

671795 is a wasteful number, since it uses less digits than its factorization.

671795 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134364.

The product of its digits is 13230, while the sum is 35.

The square root of 671795 is about 819.6310145425. The cubic root of 671795 is about 87.5814751318.

The spelling of 671795 in words is "six hundred seventy-one thousand, seven hundred ninety-five".