245684 has 12 divisors (see below), whose sum is σ = 455364. Its totient is φ = 115584.

The previous prime is 245683. The next prime is 245711. The reversal of 245684 is 486542.

It can be written as a sum of positive squares in 2 ways, for example, as 67600 + 178084 = 260^2 + 422^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245681) 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 3 ways as a sum of consecutive naturals, for example, 1739 + ... + 1874.

It is an arithmetic number, because the mean of its divisors is an integer number (37947).

2²⁴⁵⁶⁸⁴ is an apocalyptic number.

It is an amenable number.

245684 is a deficient number, since it is larger than the sum of its proper divisors (209680).

245684 is a wasteful number, since it uses less digits than its factorization.

245684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3634 (or 3632 counting only the distinct ones).

The product of its digits is 7680, while the sum is 29.

The square root of 245684 is about 495.6652095921. The cubic root of 245684 is about 62.6314247801.

It can be divided in two parts, 245 and 684, that added together give a palindrome (929).

The spelling of 245684 in words is "two hundred forty-five thousand, six hundred eighty-four".