25305730 has 8 divisors (see below), whose sum is σ = 45550332. Its totient is φ = 10122288.

The previous prime is 25305697. The next prime is 25305757. The reversal of 25305730 is 3750352.

It can be written as a sum of positive squares in 2 ways, for example, as 25130169 + 175561 = 5013^2 + 419^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 25305695 and 25305704.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1265277 + ... + 1265296.

Almost surely, 2^25305730 is an apocalyptic number.

25305730 is a deficient number, since it is larger than the sum of its proper divisors (20244602).

25305730 is a wasteful number, since it uses less digits than its factorization.

25305730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2530580.

The product of its (nonzero) digits is 3150, while the sum is 25.

The square root of 25305730 is about 5030.4800963725. The cubic root of 25305730 is about 293.5888943053.

The spelling of 25305730 in words is "twenty-five million, three hundred five thousand, seven hundred thirty".