25242205 has 4 divisors (see below), whose sum is σ = 30290652. Its totient is φ = 20193760.

The previous prime is 25242199. The next prime is 25242281. The reversal of 25242205 is 50224252.

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 16826404 + 8415801 = 4102^2 + 2901^2 .

It is not a de Polignac number, because 25242205 - 2¹⁷ = 25111133 is a prime.

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, 2524216 + ... + 2524225.

It is an arithmetic number, because the mean of its divisors is an integer number (7572663).

Almost surely, 2^25242205 is an apocalyptic number.

It is an amenable number.

25242205 is a deficient number, since it is larger than the sum of its proper divisors (5048447).

25242205 is an equidigital number, since it uses as much as digits as its factorization.

25242205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5048446.

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 25242205 is about 5024.1621191996. The cubic root of 25242205 is about 293.3430229524.

Adding to 25242205 its reverse (50224252), we get a palindrome (75466457).

The spelling of 25242205 in words is "twenty-five million, two hundred forty-two thousand, two hundred five".