520647242 has 16 divisors (see below), whose sum is σ = 795007752. Its totient is φ = 255674880.

The previous prime is 520647227. The next prime is 520647293. The reversal of 520647242 is 242746025.

It can be written as a sum of positive squares in 4 ways, for example, as 476941921 + 43705321 = 21839^2 + 6611^2 .

It is a junction number, because it is equal to n+sod(n) for n = 520647199 and 520647208.

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, 27788 + ... + 42584.

Almost surely, 2^520647242 is an apocalyptic number.

520647242 is a deficient number, since it is larger than the sum of its proper divisors (274360510).

520647242 is a wasteful number, since it uses less digits than its factorization.

520647242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15113.

The product of its (nonzero) digits is 26880, while the sum is 32.

The square root of 520647242 is about 22817.6958082976. The cubic root of 520647242 is about 804.4786521796.

The spelling of 520647242 in words is "five hundred twenty million, six hundred forty-seven thousand, two hundred forty-two".