25385409 has 12 divisors (see below), whose sum is σ = 41906176. Its totient is φ = 14505912.

The previous prime is 25385407. The next prime is 25385417. The reversal of 25385409 is 90458352.

It is not a de Polignac number, because 25385409 - 2¹ = 25385407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25385401) 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 11 ways as a sum of consecutive naturals, for example, 201409 + ... + 201534.

Almost surely, 2^25385409 is an apocalyptic number.

It is an amenable number.

25385409 is a deficient number, since it is larger than the sum of its proper divisors (16520767).

25385409 is a wasteful number, since it uses less digits than its factorization.

25385409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402956 (or 402953 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 25385409 is about 5038.3934939621. The cubic root of 25385409 is about 293.8967081265.

The spelling of 25385409 in words is "twenty-five million, three hundred eighty-five thousand, four hundred nine".