511730 has 16 divisors (see below), whose sum is σ = 935064. Its totient is φ = 201600.

The previous prime is 511723. The next prime is 511757. The reversal of 511730 is 37115.

511730 is nontrivially palindromic in base 9.

It can be written as a sum of positive squares in 4 ways, for example, as 485809 + 25921 = 697^2 + 161^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 511699 and 511708.

It is a congruent number.

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, 380 + ... + 1080.

2⁵¹¹⁷³⁰ is an apocalyptic number.

511730 is a deficient number, since it is larger than the sum of its proper divisors (423334).

511730 is a wasteful number, since it uses less digits than its factorization.

511730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781.

The product of its (nonzero) digits is 105, while the sum is 17.

The square root of 511730 is about 715.3530596845. The cubic root of 511730 is about 79.9859350274.

Adding to 511730 its reverse (37115), we get a palindrome (548845).

The spelling of 511730 in words is "five hundred eleven thousand, seven hundred thirty".