25430605 has 4 divisors (see below), whose sum is σ = 30516732. Its totient is φ = 20344480.

The previous prime is 25430599. The next prime is 25430609. The reversal of 25430605 is 50603452.

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 13638249 + 11792356 = 3693^2 + 3434^2 .

It is not a de Polignac number, because 25430605 - 2¹⁵ = 25397837 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 25430605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25430609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2543056 + ... + 2543065.

It is an arithmetic number, because the mean of its divisors is an integer number (7629183).

Almost surely, 2^25430605 is an apocalyptic number.

It is an amenable number.

25430605 is a deficient number, since it is larger than the sum of its proper divisors (5086127).

25430605 is an equidigital number, since it uses as much as digits as its factorization.

25430605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5086126.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 25430605 is about 5042.8766592095. The cubic root of 25430605 is about 294.0710219150.

The spelling of 25430605 in words is "twenty-five million, four hundred thirty thousand, six hundred five".