520534261 has 4 divisors (see below), whose sum is σ = 560575372. Its totient is φ = 480493152.

The previous prime is 520534247. The next prime is 520534277. The reversal of 520534261 is 162435025.

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 26316900 + 494217361 = 5130^2 + 22231^2 .

It is a cyclic number.

It is not a de Polignac number, because 520534261 - 2⁹ = 520533749 is a prime.

It is a super-2 number, since 2×520534261² = 541911833749632242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520534291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20020536 + ... + 20020561.

It is an arithmetic number, because the mean of its divisors is an integer number (140143843).

Almost surely, 2^520534261 is an apocalyptic number.

It is an amenable number.

520534261 is a deficient number, since it is larger than the sum of its proper divisors (40041111).

520534261 is a wasteful number, since it uses less digits than its factorization.

520534261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40041110.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 520534261 is about 22815.2199419598. The cubic root of 520534261 is about 804.4204570650.

Adding to 520534261 its reverse (162435025), we get a palindrome (682969286).

The spelling of 520534261 in words is "five hundred twenty million, five hundred thirty-four thousand, two hundred sixty-one".