671181 has 16 divisors (see below), whose sum is σ = 1056768. Its totient is φ = 370800.

The previous prime is 671161. The next prime is 671189. The reversal of 671181 is 181176.

It is not a de Polignac number, because 671181 - 2⁹ = 670669 is a prime.

It is a super-2 number, since 2×671181² = 900967869522, which contains 22 as substring.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 671181.

It is not an unprimeable number, because it can be changed into a prime (671189) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136 + ... + 1166.

It is an arithmetic number, because the mean of its divisors is an integer number (66048).

2⁶⁷¹¹⁸¹ is an apocalyptic number.

It is an amenable number.

671181 is a deficient number, since it is larger than the sum of its proper divisors (385587).

671181 is a wasteful number, since it uses less digits than its factorization.

671181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1072.

The product of its digits is 336, while the sum is 24.

The square root of 671181 is about 819.2563701309. The cubic root of 671181 is about 87.5547847391.

The spelling of 671181 in words is "six hundred seventy-one thousand, one hundred eighty-one".