511285 has 8 divisors (see below), whose sum is σ = 617400. Its totient is φ = 406464.

The previous prime is 511279. The next prime is 511289. The reversal of 511285 is 582115.

It can be written as a sum of positive squares in 4 ways, for example, as 221841 + 289444 = 471^2 + 538^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 511285 - 2⁹ = 510773 is a prime.

It is a super-2 number, since 2×511285² = 522824702450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (511289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1291 + ... + 1639.

It is an arithmetic number, because the mean of its divisors is an integer number (77175).

2⁵¹¹²⁸⁵ is an apocalyptic number.

It is an amenable number.

511285 is a deficient number, since it is larger than the sum of its proper divisors (106115).

511285 is a wasteful number, since it uses less digits than its factorization.

511285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647.

The product of its digits is 400, while the sum is 22.

The square root of 511285 is about 715.0419568109. The cubic root of 511285 is about 79.9627430684.

The spelling of 511285 in words is "five hundred eleven thousand, two hundred eighty-five".