25452609 has 48 divisors (see below), whose sum is σ = 44815680. Its totient is φ = 12700800.

The previous prime is 25452607. The next prime is 25452619. The reversal of 25452609 is 90625452.

It is not a de Polignac number, because 25452609 - 2¹ = 25452607 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25452609.

It is not an unprimeable number, because it can be changed into a prime (25452601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 35959 + ... + 36659.

It is an arithmetic number, because the mean of its divisors is an integer number (933660).

Almost surely, 2^25452609 is an apocalyptic number.

It is an amenable number.

25452609 is a deficient number, since it is larger than the sum of its proper divisors (19363071).

25452609 is a wasteful number, since it uses less digits than its factorization.

25452609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750 (or 743 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 25452609 is about 5045.0578787562. The cubic root of 25452609 is about 294.1558130997.

The spelling of 25452609 in words is "twenty-five million, four hundred fifty-two thousand, six hundred nine".