25740009 has 12 divisors (see below), whose sum is σ = 37542336. Its totient is φ = 16992792.

The previous prime is 25740007. The next prime is 25740031. The reversal of 25740009 is 90004752.

25740009 is a `hidden beast` number, since 257 + 400 + 0 + 9 = 666.

It is not a de Polignac number, because 25740009 - 2¹ = 25740007 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25740007) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 12957 + ... + 14810.

It is an arithmetic number, because the mean of its divisors is an integer number (3128528).

Almost surely, 2^25740009 is an apocalyptic number.

It is an amenable number.

25740009 is a deficient number, since it is larger than the sum of its proper divisors (11802327).

25740009 is a wasteful number, since it uses less digits than its factorization.

25740009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27876 (or 27873 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 25740009 is about 5073.4612445548. The cubic root of 25740009 is about 295.2588324916.

The spelling of 25740009 in words is "twenty-five million, seven hundred forty thousand, nine".