25535009 has 4 divisors (see below), whose sum is σ = 25656240. Its totient is φ = 25413780.

The previous prime is 25534997. The next prime is 25535021. The reversal of 25535009 is 90053552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (25534997) and next prime (25535021).

It is a cyclic number.

It is not a de Polignac number, because 25535009 - 2⁸ = 25534753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25535099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60299 + ... + 60720.

It is an arithmetic number, because the mean of its divisors is an integer number (6414060).

Almost surely, 2^25535009 is an apocalyptic number.

It is an amenable number.

25535009 is a deficient number, since it is larger than the sum of its proper divisors (121231).

25535009 is a wasteful number, since it uses less digits than its factorization.

25535009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121230.

The product of its (nonzero) digits is 6750, while the sum is 29.

The square root of 25535009 is about 5053.2176877708. The cubic root of 25535009 is about 294.4729034423.

The spelling of 25535009 in words is "twenty-five million, five hundred thirty-five thousand, nine".