671870 has 8 divisors (see below), whose sum is σ = 1209384. Its totient is φ = 268744.

The previous prime is 671851. The next prime is 671887. The reversal of 671870 is 78176.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33584 + ... + 33603.

It is an arithmetic number, because the mean of its divisors is an integer number (151173).

2⁶⁷¹⁸⁷⁰ is an apocalyptic number.

671870 is a deficient number, since it is larger than the sum of its proper divisors (537514).

671870 is a wasteful number, since it uses less digits than its factorization.

671870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67194.

The product of its (nonzero) digits is 2352, while the sum is 29.

The square root of 671870 is about 819.6767655607. The cubic root of 671870 is about 87.5847342441.

The spelling of 671870 in words is "six hundred seventy-one thousand, eight hundred seventy".