25305009 has 16 divisors (see below), whose sum is σ = 34618752. Its totient is φ = 16435328.

The previous prime is 25305001. The next prime is 25305013. The reversal of 25305009 is 90050352.

It is a cyclic number.

It is not a de Polignac number, because 25305009 - 2³ = 25305001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25305009.

It is not an unprimeable number, because it can be changed into a prime (25305001) 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, 26077 + ... + 27029.

It is an arithmetic number, because the mean of its divisors is an integer number (2163672).

Almost surely, 2^25305009 is an apocalyptic number.

It is an amenable number.

25305009 is a deficient number, since it is larger than the sum of its proper divisors (9313743).

25305009 is a wasteful number, since it uses less digits than its factorization.

25305009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1176.

The product of its (nonzero) digits is 1350, while the sum is 24.

The square root of 25305009 is about 5030.4084327219. The cubic root of 25305009 is about 293.5861060092.

The spelling of 25305009 in words is "twenty-five million, three hundred five thousand, nine".