520000025 has 12 divisors (see below), whose sum is σ = 651450492. Its totient is φ = 411709440.

The previous prime is 520000021. The next prime is 520000069.

520000025 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 6 ways, for example, as 22174681 + 497825344 = 4709^2 + 22312^2 .

It is not a de Polignac number, because 520000025 - 2² = 520000021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 519999964 and 520000009.

It is not an unprimeable number, because it can be changed into a prime (520000021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104792 + ... + 109641.

It is an arithmetic number, because the mean of its divisors is an integer number (54287541).

Almost surely, 2^520000025 is an apocalyptic number.

It is an amenable number.

520000025 is a deficient number, since it is larger than the sum of its proper divisors (131450467).

520000025 is a wasteful number, since it uses less digits than its factorization.

520000025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214540 (or 214535 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 14.

The square root of 520000025 is about 22803.5090501440. The cubic root of 520000025 is about 804.1451646048.

It can be divided in two parts, 5200000 and 25, that added together give a palindrome (5200025).

The spelling of 520000025 in words is "five hundred twenty million, twenty-five", and thus it is an aban number.