520146505 has 8 divisors (see below), whose sum is σ = 635953032. Its totient is φ = 408265728.

The previous prime is 520146499. The next prime is 520146511. The reversal of 520146505 is 505641025.

It is an interprime number because it is at equal distance from previous prime (520146499) and next prime (520146511).

It can be written as a sum of positive squares in 4 ways, for example, as 281165824 + 238980681 = 16768^2 + 15459^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520146505 is a prime.

It is a Duffinian number.

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, 981144 + ... + 981673.

It is an arithmetic number, because the mean of its divisors is an integer number (79494129).

Almost surely, 2^520146505 is an apocalyptic number.

It is an amenable number.

520146505 is a deficient number, since it is larger than the sum of its proper divisors (115806527).

520146505 is a wasteful number, since it uses less digits than its factorization.

520146505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1962875.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 520146505 is about 22806.7206103815. The cubic root of 520146505 is about 804.2206646813.

The spelling of 520146505 in words is "five hundred twenty million, one hundred forty-six thousand, five hundred five".