671571 has 10 divisors (see below), whose sum is σ = 1003332. Its totient is φ = 447660.

The previous prime is 671557. The next prime is 671581. The reversal of 671571 is 175176.

It is not a de Polignac number, because 671571 - 2⁷ = 671443 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (671501) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4065 + ... + 4226.

2⁶⁷¹⁵⁷¹ is an apocalyptic number.

671571 is a deficient number, since it is larger than the sum of its proper divisors (331761).

671571 is an equidigital number, since it uses as much as digits as its factorization.

671571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8303 (or 8294 counting only the distinct ones).

The product of its digits is 1470, while the sum is 27.

The square root of 671571 is about 819.4943562954. The cubic root of 671571 is about 87.5717398051.

It can be divided in two parts, 6715 and 71, that added together give a triangular number (6786 = T₁₁₆).

The spelling of 671571 in words is "six hundred seventy-one thousand, five hundred seventy-one".