25530009 has 8 divisors (see below), whose sum is σ = 34190880. Its totient is φ = 16944576.

The previous prime is 25530007. The next prime is 25530013. The reversal of 25530009 is 90003552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25530009 - 2¹ = 25530007 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25530007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18064 + ... + 19425.

It is an arithmetic number, because the mean of its divisors is an integer number (4273860).

Almost surely, 2^25530009 is an apocalyptic number.

It is an amenable number.

25530009 is a deficient number, since it is larger than the sum of its proper divisors (8660871).

25530009 is a wasteful number, since it uses less digits than its factorization.

25530009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37719.

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

The square root of 25530009 is about 5052.7229292729. The cubic root of 25530009 is about 294.4536819801.

The spelling of 25530009 in words is "twenty-five million, five hundred thirty thousand, nine".