25272009 has 48 divisors (see below), whose sum is σ = 44209152. Its totient is φ = 13600224.

The previous prime is 25271993. The next prime is 25272017. The reversal of 25272009 is 90027252.

It is a happy number.

It is not a de Polignac number, because 25272009 - 2⁴ = 25271993 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25272019) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 154962 + ... + 155124.

It is an arithmetic number, because the mean of its divisors is an integer number (921024).

Almost surely, 2^25272009 is an apocalyptic number.

It is an amenable number.

25272009 is a deficient number, since it is larger than the sum of its proper divisors (18937143).

25272009 is a wasteful number, since it uses less digits than its factorization.

25272009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306 (or 303 counting only the distinct ones).

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

The square root of 25272009 is about 5027.1273109003. The cubic root of 25272009 is about 293.4584296265.

The spelling of 25272009 in words is "twenty-five million, two hundred seventy-two thousand, nine".