25209265 has 16 divisors (see below), whose sum is σ = 32659200. Its totient is φ = 18622912.

The previous prime is 25209259. The next prime is 25209269. The reversal of 25209265 is 56290252.

It is a cyclic number.

It is not a de Polignac number, because 25209265 - 2¹⁹ = 24684977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25209269) 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, 445 + ... + 7114.

It is an arithmetic number, because the mean of its divisors is an integer number (2041200).

Almost surely, 2^25209265 is an apocalyptic number.

It is an amenable number.

25209265 is a deficient number, since it is larger than the sum of its proper divisors (7449935).

25209265 is a wasteful number, since it uses less digits than its factorization.

25209265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7616.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 25209265 is about 5020.8828904885. The cubic root of 25209265 is about 293.2153673670.

The spelling of 25209265 in words is "twenty-five million, two hundred nine thousand, two hundred sixty-five".