511265 has 4 divisors (see below), whose sum is σ = 613524. Its totient is φ = 409008.

The previous prime is 511261. The next prime is 511279. The reversal of 511265 is 562115.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 350464 + 160801 = 592^2 + 401^2 .

It is a cyclic number.

It is not a de Polignac number, because 511265 - 2² = 511261 is a prime.

It is a super-2 number, since 2×511265² = 522783800450, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (511261) 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, 51122 + ... + 51131.

It is an arithmetic number, because the mean of its divisors is an integer number (153381).

2⁵¹¹²⁶⁵ is an apocalyptic number.

It is an amenable number.

511265 is a deficient number, since it is larger than the sum of its proper divisors (102259).

511265 is a wasteful number, since it uses less digits than its factorization.

511265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102258.

The product of its digits is 300, while the sum is 20.

The square root of 511265 is about 715.0279714808. The cubic root of 511265 is about 79.9617004172.

The spelling of 511265 in words is "five hundred eleven thousand, two hundred sixty-five".