520605842 has 8 divisors (see below), whose sum is σ = 793710732. Its totient is φ = 256035600.

The previous prime is 520605829. The next prime is 520605857. The reversal of 520605842 is 248506025.

It can be written as a sum of positive squares in 2 ways, for example, as 368601601 + 152004241 = 19199^2 + 12329^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 520605799 and 520605808.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2133509 + ... + 2133752.

Almost surely, 2^520605842 is an apocalyptic number.

520605842 is a deficient number, since it is larger than the sum of its proper divisors (273104890).

520605842 is a wasteful number, since it uses less digits than its factorization.

520605842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4267324.

The product of its (nonzero) digits is 19200, while the sum is 32.

The square root of 520605842 is about 22816.7885996255. The cubic root of 520605842 is about 804.4573285294.

The spelling of 520605842 in words is "five hundred twenty million, six hundred five thousand, eight hundred forty-two".