671407 has 8 divisors (see below), whose sum is σ = 744192. Its totient is φ = 600600.

The previous prime is 671401. The next prime is 671417. The reversal of 671407 is 704176.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 671407 - 2¹¹ = 669359 is a prime.

It is a Duffinian number.

671407 is a lucky number.

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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 282 + ... + 1192.

It is an arithmetic number, because the mean of its divisors is an integer number (93024).

2⁶⁷¹⁴⁰⁷ is an apocalyptic number.

671407 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

671407 is a deficient number, since it is larger than the sum of its proper divisors (72785).

671407 is a wasteful number, since it uses less digits than its factorization.

671407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 671407 is about 819.3942884839. The cubic root of 671407 is about 87.5646107825.

The spelling of 671407 in words is "six hundred seventy-one thousand, four hundred seven".