245724 has 12 divisors (see below), whose sum is σ = 573384. Its totient is φ = 81904.

The previous prime is 245723. The next prime is 245741. The reversal of 245724 is 427542.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 245694 and 245703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245723) 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, 10227 + ... + 10250.

It is an arithmetic number, because the mean of its divisors is an integer number (47782).

2²⁴⁵⁷²⁴ is an apocalyptic number.

It is an amenable number.

245724 is an abundant number, since it is smaller than the sum of its proper divisors (327660).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

245724 is a wasteful number, since it uses less digits than its factorization.

245724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20484 (or 20482 counting only the distinct ones).

The product of its digits is 2240, while the sum is 24.

The square root of 245724 is about 495.7055577659. The cubic root of 245724 is about 62.6348236190.

It can be divided in two parts, 245 and 724, that added together give a palindrome (969).

The spelling of 245724 in words is "two hundred forty-five thousand, seven hundred twenty-four".