671575 has 6 divisors (see below), whose sum is σ = 832784. Its totient is φ = 537240.

The previous prime is 671557. The next prime is 671581. The reversal of 671575 is 575176.

It is not a de Polignac number, because 671575 - 2⁹ = 671063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13407 + ... + 13456.

2⁶⁷¹⁵⁷⁵ is an apocalyptic number.

671575 is a deficient number, since it is larger than the sum of its proper divisors (161209).

671575 is a wasteful number, since it uses less digits than its factorization.

671575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26873 (or 26868 counting only the distinct ones).

The product of its digits is 7350, while the sum is 31.

The square root of 671575 is about 819.4967968211. The cubic root of 671575 is about 87.5719136692.

Subtracting from 671575 its product of digits (7350), we obtain a square (664225 = 815²).

The spelling of 671575 in words is "six hundred seventy-one thousand, five hundred seventy-five".