25707245 has 4 divisors (see below), whose sum is σ = 30848700. Its totient is φ = 20565792.

The previous prime is 25707239. The next prime is 25707301. The reversal of 25707245 is 54270752.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5466244 + 20241001 = 2338^2 + 4499^2 .

It is a cyclic number.

It is not a de Polignac number, because 25707245 - 2⁶ = 25707181 is a prime.

It is a Curzon number.

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 3 ways as a sum of consecutive naturals, for example, 2570720 + ... + 2570729.

It is an arithmetic number, because the mean of its divisors is an integer number (7712175).

Almost surely, 2^25707245 is an apocalyptic number.

It is an amenable number.

25707245 is a deficient number, since it is larger than the sum of its proper divisors (5141455).

25707245 is an equidigital number, since it uses as much as digits as its factorization.

25707245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5141454.

The product of its (nonzero) digits is 19600, while the sum is 32.

The square root of 25707245 is about 5070.2312570533. The cubic root of 25707245 is about 295.1335027264.

Adding to 25707245 its reverse (54270752), we get a palindrome (79977997).

It can be divided in two parts, 25707 and 245, that added together give a palindrome (25952).

The spelling of 25707245 in words is "twenty-five million, seven hundred seven thousand, two hundred forty-five".