25305725 has 6 divisors (see below), whose sum is σ = 31379130. Its totient is φ = 20244560.

The previous prime is 25305697. The next prime is 25305757. The reversal of 25305725 is 52750352.

It can be written as a sum of positive squares in 3 ways, for example, as 14884 + 25290841 = 122^2 + 5029^2 .

It is not a de Polignac number, because 25305725 - 2¹⁰ = 25304701 is a prime.

It is a congruent number.

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, 506090 + ... + 506139.

It is an arithmetic number, because the mean of its divisors is an integer number (5229855).

Almost surely, 2^25305725 is an apocalyptic number.

25305725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25305725 is a deficient number, since it is larger than the sum of its proper divisors (6073405).

25305725 is a wasteful number, since it uses less digits than its factorization.

25305725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012239 (or 1012234 counting only the distinct ones).

The product of its (nonzero) digits is 10500, while the sum is 29.

The square root of 25305725 is about 5030.4795994020. The cubic root of 25305725 is about 293.5888749692.

The spelling of 25305725 in words is "twenty-five million, three hundred five thousand, seven hundred twenty-five".