671447 has 12 divisors (see below), whose sum is σ = 796176. Its totient is φ = 564480.

The previous prime is 671443. The next prime is 671467. The reversal of 671447 is 744176.

It is a happy number.

It is not a de Polignac number, because 671447 - 2² = 671443 is a prime.

It is an Ulam number.

It is a Duffinian 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 671447.

It is not an unprimeable number, because it can be changed into a prime (671443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3383 + ... + 3575.

It is an arithmetic number, because the mean of its divisors is an integer number (66348).

2⁶⁷¹⁴⁴⁷ is an apocalyptic number.

671447 is a deficient number, since it is larger than the sum of its proper divisors (124729).

671447 is a wasteful number, since it uses less digits than its factorization.

671447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278 (or 271 counting only the distinct ones).

The product of its digits is 4704, while the sum is 29.

The square root of 671447 is about 819.4186963940. The cubic root of 671447 is about 87.5663496755.

The spelling of 671447 in words is "six hundred seventy-one thousand, four hundred forty-seven".