671256 has 24 divisors (see below), whose sum is σ = 1818180. Its totient is φ = 223728.

The previous prime is 671249. The next prime is 671257. The reversal of 671256 is 652176.

It is a tau number, because it is divible by the number of its divisors (24).

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671257) 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, 4590 + ... + 4733.

2⁶⁷¹²⁵⁶ is an apocalyptic number.

It is an amenable number.

671256 is an abundant number, since it is smaller than the sum of its proper divisors (1146924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

671256 is a wasteful number, since it uses less digits than its factorization.

671256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9335 (or 9328 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 671256 is about 819.3021420697. The cubic root of 671256 is about 87.5580458387.

The spelling of 671256 in words is "six hundred seventy-one thousand, two hundred fifty-six".