25385521 has 8 divisors (see below), whose sum is σ = 29042624. Its totient is φ = 21736080.

The previous prime is 25385513. The next prime is 25385533. The reversal of 25385521 is 12558352.

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

It is a cyclic number.

It is not a de Polignac number, because 25385521 - 2³ = 25385513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25385561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11146 + ... + 13228.

It is an arithmetic number, because the mean of its divisors is an integer number (3630328).

Almost surely, 2^25385521 is an apocalyptic number.

It is an amenable number.

25385521 is a deficient number, since it is larger than the sum of its proper divisors (3657103).

25385521 is a wasteful number, since it uses less digits than its factorization.

25385521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3831.

The product of its digits is 12000, while the sum is 31.

The square root of 25385521 is about 5038.4046086038. The cubic root of 25385521 is about 293.8971403483.

The spelling of 25385521 in words is "twenty-five million, three hundred eighty-five thousand, five hundred twenty-one".