671504 has 10 divisors (see below), whose sum is σ = 1301070. Its totient is φ = 335744.

The previous prime is 671501. The next prime is 671519. The reversal of 671504 is 405176.

It can be written as a sum of positive squares in only one way, i.e., 547600 + 123904 = 740^2 + 352^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 671504.

It is not an unprimeable number, because it can be changed into a prime (671501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20969 + ... + 21000.

It is an arithmetic number, because the mean of its divisors is an integer number (130107).

2⁶⁷¹⁵⁰⁴ is an apocalyptic number.

It is an amenable number.

671504 is a deficient number, since it is larger than the sum of its proper divisors (629566).

671504 is a wasteful number, since it uses less digits than its factorization.

671504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41977 (or 41971 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 671504 is about 819.4534764097. The cubic root of 671504 is about 87.5688274788.

The spelling of 671504 in words is "six hundred seventy-one thousand, five hundred four".