520523042 has 12 divisors (see below), whose sum is σ = 845465490. Its totient is φ = 240241248.

The previous prime is 520523039. The next prime is 520523057. The reversal of 520523042 is 240325025.

It can be written as a sum of positive squares in 3 ways, for example, as 143736121 + 376786921 = 11989^2 + 19411^2 .

It is a junction number, because it is equal to n+sod(n) for n = 520522999 and 520523017.

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 5 ways as a sum of consecutive naturals, for example, 769667 + ... + 770342.

Almost surely, 2^520523042 is an apocalyptic number.

520523042 is a deficient number, since it is larger than the sum of its proper divisors (324942448).

520523042 is a wasteful number, since it uses less digits than its factorization.

520523042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1540037 (or 1540024 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 520523042 is about 22814.9740740593. The cubic root of 520523042 is about 804.4146778373.

Adding to 520523042 its reverse (240325025), we get a palindrome (760848067).

The spelling of 520523042 in words is "five hundred twenty million, five hundred twenty-three thousand, forty-two".