684241 has 4 divisors (see below), whose sum is σ = 702772. Its totient is φ = 665712.

The previous prime is 684239. The next prime is 684269. The reversal of 684241 is 142486.

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 462400 + 221841 = 680^2 + 471^2 .

It is a cyclic number.

It is not a de Polignac number, because 684241 - 2¹ = 684239 is a prime.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 9210 + ... + 9283.

It is an arithmetic number, because the mean of its divisors is an integer number (175693).

2⁶⁸⁴²⁴¹ is an apocalyptic number.

It is an amenable number.

684241 is a deficient number, since it is larger than the sum of its proper divisors (18531).

684241 is a wasteful number, since it uses less digits than its factorization.

684241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18530.

The product of its digits is 1536, while the sum is 25.

The square root of 684241 is about 827.1886121073. The cubic root of 684241 is about 88.1190279809.

The spelling of 684241 in words is "six hundred eighty-four thousand, two hundred forty-one".