505242025 has 6 divisors (see below), whose sum is σ = 626500142. Its totient is φ = 404193600.

The previous prime is 505242011. The next prime is 505242029. The reversal of 505242025 is 520242505.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 4064256 + 501177769 = 2016^2 + 22387^2 .

It is not a de Polignac number, because 505242025 - 2²³ = 496853417 is a prime.

It is a super-2 number, since 2×505242025² = 510539007652201250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 20209681 = 505242025 / (5 + 0 + 5 + 2 + 4 + 2 + 0 + 2 + 5).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505242029) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10104816 + ... + 10104865.

Almost surely, 2^505242025 is an apocalyptic number.

It is an amenable number.

505242025 is a deficient number, since it is larger than the sum of its proper divisors (121258117).

505242025 is a wasteful number, since it uses less digits than its factorization.

505242025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20209691 (or 20209686 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 25.

The square root of 505242025 is about 22477.5893947727. The cubic root of 505242025 is about 796.4646207358.

The spelling of 505242025 in words is "five hundred five million, two hundred forty-two thousand, twenty-five".