671895 has 48 divisors (see below), whose sum is σ = 1397760. Its totient is φ = 303264.

The previous prime is 671893. The next prime is 671903. The reversal of 671895 is 598176.

It is not a de Polignac number, because 671895 - 2¹ = 671893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671893) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8466 + ... + 8544.

It is an arithmetic number, because the mean of its divisors is an integer number (29120).

2⁶⁷¹⁸⁹⁵ is an apocalyptic number.

671895 is an abundant number, since it is smaller than the sum of its proper divisors (725865).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

671895 is an equidigital number, since it uses as much as digits as its factorization.

671895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106 (or 94 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 671895 is about 819.6920153326. The cubic root of 671895 is about 87.5858205610.

The spelling of 671895 in words is "six hundred seventy-one thousand, eight hundred ninety-five".