671156 has 12 divisors (see below), whose sum is σ = 1236480. Its totient is φ = 317880.

The previous prime is 671141. The next prime is 671159. The reversal of 671156 is 651176.

It is an Ulam number.

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 671156.

It is not an unprimeable number, because it can be changed into a prime (671159) by changing a digit.

671156 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 4340 + ... + 4491.

It is an arithmetic number, because the mean of its divisors is an integer number (103040).

2⁶⁷¹¹⁵⁶ is an apocalyptic number.

It is an amenable number.

671156 is a deficient number, since it is larger than the sum of its proper divisors (565324).

671156 is a wasteful number, since it uses less digits than its factorization.

671156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8854 (or 8852 counting only the distinct ones).

The product of its digits is 1260, while the sum is 26.

The square root of 671156 is about 819.2411122496. The cubic root of 671156 is about 87.5536976519.

The spelling of 671156 in words is "six hundred seventy-one thousand, one hundred fifty-six".