671975 has 6 divisors (see below), whose sum is σ = 833280. Its totient is φ = 537560.

The previous prime is 671971. The next prime is 671981. The reversal of 671975 is 579176.

It is not a de Polignac number, because 671975 - 2² = 671971 is a prime.

It is a plaindrome in base 6 and base 9.

It is a zygodrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671971) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13415 + ... + 13464.

It is an arithmetic number, because the mean of its divisors is an integer number (138880).

2⁶⁷¹⁹⁷⁵ is an apocalyptic number.

671975 is a deficient number, since it is larger than the sum of its proper divisors (161305).

671975 is a wasteful number, since it uses less digits than its factorization.

671975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26889 (or 26884 counting only the distinct ones).

The product of its digits is 13230, while the sum is 35.

The square root of 671975 is about 819.7408126963. The cubic root of 671975 is about 87.5892965940.

The spelling of 671975 in words is "six hundred seventy-one thousand, nine hundred seventy-five".