671465 has 4 divisors (see below), whose sum is σ = 805764. Its totient is φ = 537168.

The previous prime is 671443. The next prime is 671467. The reversal of 671465 is 564176.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 444889 + 226576 = 667^2 + 476^2 .

It is a cyclic number.

It is not a de Polignac number, because 671465 - 2⁶ = 671401 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 671465.

It is not an unprimeable number, because it can be changed into a prime (671467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67142 + ... + 67151.

It is an arithmetic number, because the mean of its divisors is an integer number (201441).

2⁶⁷¹⁴⁶⁵ is an apocalyptic number.

It is an amenable number.

671465 is a deficient number, since it is larger than the sum of its proper divisors (134299).

671465 is a wasteful number, since it uses less digits than its factorization.

671465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134298.

The product of its digits is 5040, while the sum is 29.

The square root of 671465 is about 819.4296797163. The cubic root of 671465 is about 87.5671321549.

The spelling of 671465 in words is "six hundred seventy-one thousand, four hundred sixty-five".