245730 has 16 divisors (see below), whose sum is σ = 589824. Its totient is φ = 65520.

The previous prime is 245723. The next prime is 245741. The reversal of 245730 is 37542.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 245697 and 245706.

It is an unprimeable number.

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, 4066 + ... + 4125.

It is an arithmetic number, because the mean of its divisors is an integer number (36864).

245730 is a Friedman number, since it can be written as 5*3*(4^7-2-0), using all its digits and the basic arithmetic operations.

2²⁴⁵⁷³⁰ is an apocalyptic number.

245730 is an abundant number, since it is smaller than the sum of its proper divisors (344094).

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

245730 is a wasteful number, since it uses less digits than its factorization.

245730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8201.

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 245730 is about 495.7116097087. The cubic root of 245730 is about 62.6353334130.

The spelling of 245730 in words is "two hundred forty-five thousand, seven hundred thirty".