520121025 has 36 divisors (see below), whose sum is σ = 956788092. Its totient is φ = 269896320.

The previous prime is 520121023. The next prime is 520121027.

520121025 is a `hidden beast` number, since 520 + 121 + 0 + 25 = 666.

520121025 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (520121023) and next prime (520121027).

It can be written as a sum of positive squares in 6 ways, for example, as 3968064 + 516152961 = 1992^2 + 22719^2 .

It is not a de Polignac number, because 520121025 - 2¹ = 520121023 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 520120989 and 520121007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520121023) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 22914 + ... + 39563.

It is an arithmetic number, because the mean of its divisors is an integer number (26577447).

Almost surely, 2^520121025 is an apocalyptic number.

It is an amenable number.

520121025 is a deficient number, since it is larger than the sum of its proper divisors (436667067).

520121025 is a wasteful number, since it uses less digits than its factorization.

520121025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62530 (or 62522 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 520121025 is about 22806.1619962676. The cubic root of 520121025 is about 804.2075325625.

The spelling of 520121025 in words is "five hundred twenty million, one hundred twenty-one thousand, twenty-five".