730865 has 4 divisors (see below), whose sum is σ = 877044. Its totient is φ = 584688.

The previous prime is 730853. The next prime is 730867. The reversal of 730865 is 568037.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 568037 = 241 ⋅2357.

It can be written as a sum of positive squares in 2 ways, for example, as 361201 + 369664 = 601^2 + 608^2 .

It is a cyclic number.

It is not a de Polignac number, because 730865 - 2¹⁴ = 714481 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (730867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73082 + ... + 73091.

It is an arithmetic number, because the mean of its divisors is an integer number (219261).

2⁷³⁰⁸⁶⁵ is an apocalyptic number.

It is an amenable number.

730865 is a deficient number, since it is larger than the sum of its proper divisors (146179).

730865 is a wasteful number, since it uses less digits than its factorization.

730865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146178.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 730865 is about 854.9064276282. The cubic root of 730865 is about 90.0766836151.

The spelling of 730865 in words is "seven hundred thirty thousand, eight hundred sixty-five".