25617265 has 4 divisors (see below), whose sum is σ = 30740724. Its totient is φ = 20493808.

The previous prime is 25617259. The next prime is 25617271. The reversal of 25617265 is 56271652.

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

It is an interprime number because it is at equal distance from previous prime (25617259) and next prime (25617271).

It can be written as a sum of positive squares in 2 ways, for example, as 13198689 + 12418576 = 3633^2 + 3524^2 .

It is a cyclic number.

It is not a de Polignac number, because 25617265 - 2¹¹ = 25615217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25617265.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2561722 + ... + 2561731.

It is an arithmetic number, because the mean of its divisors is an integer number (7685181).

Almost surely, 2^25617265 is an apocalyptic number.

It is an amenable number.

25617265 is a deficient number, since it is larger than the sum of its proper divisors (5123459).

25617265 is an equidigital number, since it uses as much as digits as its factorization.

25617265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5123458.

The product of its digits is 25200, while the sum is 34.

The square root of 25617265 is about 5061.3501163227. The cubic root of 25617265 is about 294.7887600064.

The spelling of 25617265 in words is "twenty-five million, six hundred seventeen thousand, two hundred sixty-five".