520128045 has 12 divisors (see below), whose sum is σ = 901555356. Its totient is φ = 277401600.

The previous prime is 520128041. The next prime is 520128047. The reversal of 520128045 is 540821025.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 259918884 + 260209161 = 16122^2 + 16131^2 .

It is not a de Polignac number, because 520128045 - 2² = 520128041 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520128041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5779156 + ... + 5779245.

It is an arithmetic number, because the mean of its divisors is an integer number (75129613).

Almost surely, 2^520128045 is an apocalyptic number.

It is an amenable number.

520128045 is a deficient number, since it is larger than the sum of its proper divisors (381427311).

520128045 is a wasteful number, since it uses less digits than its factorization.

520128045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11558412 (or 11558409 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 520128045 is about 22806.3159015217. The cubic root of 520128045 is about 804.2111506381.

The spelling of 520128045 in words is "five hundred twenty million, one hundred twenty-eight thousand, forty-five".