671586 has 16 divisors (see below), whose sum is σ = 1353024. Its totient is φ = 222224.

The previous prime is 671581. The next prime is 671591. The reversal of 671586 is 685176.

It is an interprime number because it is at equal distance from previous prime (671581) and next prime (671591).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a nialpdrome in base 6.

It is not an unprimeable number, because it can be changed into a prime (671581) 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, 715 + ... + 1361.

It is an arithmetic number, because the mean of its divisors is an integer number (84564).

2⁶⁷¹⁵⁸⁶ is an apocalyptic number.

671586 is an abundant number, since it is smaller than the sum of its proper divisors (681438).

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

671586 is a wasteful number, since it uses less digits than its factorization.

671586 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825.

The product of its digits is 10080, while the sum is 33.

The square root of 671586 is about 819.5035082292. The cubic root of 671586 is about 87.5723917919.

It can be divided in two parts, 67 and 1586, that added together give a triangular number (1653 = T₅₇).

The spelling of 671586 in words is "six hundred seventy-one thousand, five hundred eighty-six".