25365609 has 16 divisors (see below), whose sum is σ = 38595840. Its totient is φ = 16452720.

The previous prime is 25365607. The next prime is 25365629. The reversal of 25365609 is 90656352.

It is not a de Polignac number, because 25365609 - 2¹ = 25365607 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25365607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11697 + ... + 13694.

It is an arithmetic number, because the mean of its divisors is an integer number (2412240).

Almost surely, 2^25365609 is an apocalyptic number.

It is an amenable number.

25365609 is a deficient number, since it is larger than the sum of its proper divisors (13230231).

25365609 is a wasteful number, since it uses less digits than its factorization.

25365609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25437 (or 25431 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 36.

The square root of 25365609 is about 5036.4281986344. The cubic root of 25365609 is about 293.8202774964.

The spelling of 25365609 in words is "twenty-five million, three hundred sixty-five thousand, six hundred nine".