25305025 has 6 divisors (see below), whose sum is σ = 31378262. Its totient is φ = 20244000.

The previous prime is 25305013. The next prime is 25305053. The reversal of 25305025 is 52050352.

It can be written as a sum of positive squares in 3 ways, for example, as 2808976 + 22496049 = 1676^2 + 4743^2 .

It is not a de Polignac number, because 25305025 - 2¹⁵ = 25272257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25304987 and 25305005.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 506076 + ... + 506125.

Almost surely, 2^25305025 is an apocalyptic number.

25305025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25305025 is a deficient number, since it is larger than the sum of its proper divisors (6073237).

25305025 is a wasteful number, since it uses less digits than its factorization.

25305025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012211 (or 1012206 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 22.

The square root of 25305025 is about 5030.4100230498. The cubic root of 25305025 is about 293.5861678860.

Adding to 25305025 its reverse (52050352), we get a palindrome (77355377).

The spelling of 25305025 in words is "twenty-five million, three hundred five thousand, twenty-five".