305020025 has 12 divisors (see below), whose sum is σ = 380150892. Its totient is φ = 242773440.

The previous prime is 305020021. The next prime is 305020049. The reversal of 305020025 is 520020503.

It can be written as a sum of positive squares in 6 ways, for example, as 6801664 + 298218361 = 2608^2 + 17269^2 .

It is not a de Polignac number, because 305020025 - 2² = 305020021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 305019985 and 305020012.

It is not an unprimeable number, because it can be changed into a prime (305020021) 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, 26042 + ... + 35891.

It is an arithmetic number, because the mean of its divisors is an integer number (31679241).

Almost surely, 2^305020025 is an apocalyptic number.

It is an amenable number.

305020025 is a deficient number, since it is larger than the sum of its proper divisors (75130867).

305020025 is a wasteful number, since it uses less digits than its factorization.

305020025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62140 (or 62135 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 17.

The square root of 305020025 is about 17464.8225012452. The cubic root of 305020025 is about 673.1462810536.

Adding to 305020025 its reverse (520020503), we get a palindrome (825040528).

The spelling of 305020025 in words is "three hundred five million, twenty thousand, twenty-five".