25352509 has 16 divisors (see below), whose sum is σ = 32562432. Its totient is φ = 19185408.

The previous prime is 25352501. The next prime is 25352519. The reversal of 25352509 is 90525352.

It is a cyclic number.

It is not a de Polignac number, because 25352509 - 2³ = 25352501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25352501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3964 + ... + 8149.

It is an arithmetic number, because the mean of its divisors is an integer number (2035152).

Almost surely, 2^25352509 is an apocalyptic number.

It is an amenable number.

25352509 is a deficient number, since it is larger than the sum of its proper divisors (7209923).

25352509 is a wasteful number, since it uses less digits than its factorization.

25352509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12156.

The product of its (nonzero) digits is 13500, while the sum is 31.

The square root of 25352509 is about 5035.1275058334. The cubic root of 25352509 is about 293.7696878912.

The spelling of 25352509 in words is "twenty-five million, three hundred fifty-two thousand, five hundred nine".