671005 has 8 divisors (see below), whose sum is σ = 817632. Its totient is φ = 528528.

The previous prime is 671003. The next prime is 671017. The reversal of 671005 is 500176.

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 671005 - 2¹ = 671003 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671003) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 667 + ... + 1336.

It is an arithmetic number, because the mean of its divisors is an integer number (102204).

2⁶⁷¹⁰⁰⁵ is an apocalyptic number.

It is an amenable number.

671005 is a deficient number, since it is larger than the sum of its proper divisors (146627).

671005 is a wasteful number, since it uses less digits than its factorization.

671005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2075.

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 671005 is about 819.1489486046. The cubic root of 671005 is about 87.5471310713.

The spelling of 671005 in words is "six hundred seventy-one thousand, five".