684271 has 8 divisors (see below), whose sum is σ = 794240. Its totient is φ = 577368.

The previous prime is 684269. The next prime is 684287. The reversal of 684271 is 172486.

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

It is a cyclic number.

It is not a de Polignac number, because 684271 - 2¹ = 684269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684221) 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, 261 + ... + 1198.

It is an arithmetic number, because the mean of its divisors is an integer number (99280).

2⁶⁸⁴²⁷¹ is an apocalyptic number.

684271 is a deficient number, since it is larger than the sum of its proper divisors (109969).

684271 is a wasteful number, since it uses less digits than its factorization.

684271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1533.

The product of its digits is 2688, while the sum is 28.

The square root of 684271 is about 827.2067456205. The cubic root of 684271 is about 88.1203157982.

The spelling of 684271 in words is "six hundred eighty-four thousand, two hundred seventy-one".