511266 has 48 divisors (see below), whose sum is σ = 1247616. Its totient is φ = 139104.

The previous prime is 511261. The next prime is 511279. The reversal of 511266 is 662115.

It is a happy number.

It is a super-2 number, since 2×511266² = 522785845512, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (511261) by changing a digit.

511266 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10855 + ... + 10901.

It is an arithmetic number, because the mean of its divisors is an integer number (25992).

2⁵¹¹²⁶⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 511266, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (623808).

511266 is an abundant number, since it is smaller than the sum of its proper divisors (736350).

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

511266 is a wasteful number, since it uses less digits than its factorization.

511266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103 (or 96 counting only the distinct ones).

The product of its digits is 360, while the sum is 21.

The square root of 511266 is about 715.0286707538. The cubic root of 511266 is about 79.9617525504.

It can be divided in two parts, 511 and 266, that added together give a palindrome (777).

The spelling of 511266 in words is "five hundred eleven thousand, two hundred sixty-six".