671111 has 4 divisors (see below), whose sum is σ = 766992. Its totient is φ = 575232.

The previous prime is 671093. The next prime is 671123. The reversal of 671111 is 111176.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 671111 - 2¹⁴ = 654727 is a prime.

It is a Duffinian number.

671111 is a modest number, since divided by 1111 gives 67 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 671111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671131) 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 3 ways as a sum of consecutive naturals, for example, 47930 + ... + 47943.

It is an arithmetic number, because the mean of its divisors is an integer number (191748).

2⁶⁷¹¹¹¹ is an apocalyptic number.

671111 is a deficient number, since it is larger than the sum of its proper divisors (95881).

671111 is an equidigital number, since it uses as much as digits as its factorization.

671111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95880.

The product of its digits is 42, while the sum is 17.

The square root of 671111 is about 819.2136473473. The cubic root of 671111 is about 87.5517408270.

Adding to 671111 its reverse (111176), we get a palindrome (782287).

It can be divided in two parts, 6 and 71111, that added together give a palindrome (71117).

The spelling of 671111 in words is "six hundred seventy-one thousand, one hundred eleven".