25242565 has 4 divisors (see below), whose sum is σ = 30291084. Its totient is φ = 20194048.

The previous prime is 25242533. The next prime is 25242589. The reversal of 25242565 is 56524252.

It is a happy number.

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 14699556 + 10543009 = 3834^2 + 3247^2 .

It is a cyclic number.

It is not a de Polignac number, because 25242565 - 2⁵ = 25242533 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian 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, 2524252 + ... + 2524261.

It is an arithmetic number, because the mean of its divisors is an integer number (7572771).

Almost surely, 2^25242565 is an apocalyptic number.

It is an amenable number.

25242565 is a deficient number, since it is larger than the sum of its proper divisors (5048519).

25242565 is an equidigital number, since it uses as much as digits as its factorization.

25242565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5048518.

The product of its digits is 24000, while the sum is 31.

The square root of 25242565 is about 5024.1979459412. The cubic root of 25242565 is about 293.3444174818.

The spelling of 25242565 in words is "twenty-five million, two hundred forty-two thousand, five hundred sixty-five".