671406 has 16 divisors (see below), whose sum is σ = 1350864. Its totient is φ = 222464.

The previous prime is 671401. The next prime is 671417. The reversal of 671406 is 604176.

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 671406.

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

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1726 + ... + 2078.

It is an arithmetic number, because the mean of its divisors is an integer number (84429).

2⁶⁷¹⁴⁰⁶ is an apocalyptic number.

671406 is an abundant number, since it is smaller than the sum of its proper divisors (679458).

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

671406 is a wasteful number, since it uses less digits than its factorization.

671406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 671406 is about 819.3936782768. The cubic root of 671406 is about 87.5645673093.

The spelling of 671406 in words is "six hundred seventy-one thousand, four hundred six".