671404 has 12 divisors (see below), whose sum is σ = 1197504. Its totient is φ = 329264.

The previous prime is 671401. The next prime is 671417. The reversal of 671404 is 404176.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671401) by changing a digit.

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, 1372 + ... + 1795.

It is an arithmetic number, because the mean of its divisors is an integer number (99792).

2⁶⁷¹⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

671404 is a deficient number, since it is larger than the sum of its proper divisors (526100).

671404 is a wasteful number, since it uses less digits than its factorization.

671404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3224 (or 3222 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 671404 is about 819.3924578613. The cubic root of 671404 is about 87.5644803627.

The spelling of 671404 in words is "six hundred seventy-one thousand, four hundred four".