684541 has 8 divisors (see below), whose sum is σ = 804384. Its totient is φ = 574320.

The previous prime is 684527. The next prime is 684547. The reversal of 684541 is 145486.

684541 = T₃₁₈ + T₃₁₉ + ... + T₃₃₀.

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 684541 - 2¹³ = 676349 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 (684547) 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, 2251 + ... + 2536.

It is an arithmetic number, because the mean of its divisors is an integer number (100548).

2⁶⁸⁴⁵⁴¹ is an apocalyptic number.

It is an amenable number.

684541 is a deficient number, since it is larger than the sum of its proper divisors (119843).

684541 is a wasteful number, since it uses less digits than its factorization.

684541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4811.

The product of its digits is 3840, while the sum is 28.

The square root of 684541 is about 827.3699293545. The cubic root of 684541 is about 88.1319044605.

It can be divided in two parts, 6845 and 41, that added together give a palindrome (6886).

The spelling of 684541 in words is "six hundred eighty-four thousand, five hundred forty-one".