520505045 has 8 divisors (see below), whose sum is σ = 639840600. Its totient is φ = 406247680.

The previous prime is 520505023. The next prime is 520505053. The reversal of 520505045 is 540505025.

It can be written as a sum of positive squares in 4 ways, for example, as 24373969 + 496131076 = 4937^2 + 22274^2 .

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

It is not a de Polignac number, because 520505045 - 2¹⁶ = 520439509 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1269320 + ... + 1269729.

It is an arithmetic number, because the mean of its divisors is an integer number (79980075).

Almost surely, 2^520505045 is an apocalyptic number.

It is an amenable number.

520505045 is a deficient number, since it is larger than the sum of its proper divisors (119335555).

520505045 is a wasteful number, since it uses less digits than its factorization.

520505045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2539095.

The product of its (nonzero) digits is 5000, while the sum is 26.

The square root of 520505045 is about 22814.5796586306. The cubic root of 520505045 is about 804.4054068947.

The spelling of 520505045 in words is "five hundred twenty million, five hundred five thousand, forty-five".