671215 has 4 divisors (see below), whose sum is σ = 805464. Its totient is φ = 536968.

The previous prime is 671201. The next prime is 671219. The reversal of 671215 is 512176.

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

It is a cyclic number.

It is not a de Polignac number, because 671215 - 2⁷ = 671087 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671219) 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, 67117 + ... + 67126.

It is an arithmetic number, because the mean of its divisors is an integer number (201366).

2⁶⁷¹²¹⁵ is an apocalyptic number.

671215 is a deficient number, since it is larger than the sum of its proper divisors (134249).

671215 is a wasteful number, since it uses less digits than its factorization.

671215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134248.

The product of its digits is 420, while the sum is 22.

The square root of 671215 is about 819.2771203933. The cubic root of 671215 is about 87.5562631344.

The spelling of 671215 in words is "six hundred seventy-one thousand, two hundred fifteen".