25138385 has 4 divisors (see below), whose sum is σ = 30166068. Its totient is φ = 20110704.

The previous prime is 25138363. The next prime is 25138391. The reversal of 25138385 is 58383152.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14432401 + 10705984 = 3799^2 + 3272^2 .

It is a cyclic number.

It is not a de Polignac number, because 25138385 - 2⁸ = 25138129 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2513834 + ... + 2513843.

It is an arithmetic number, because the mean of its divisors is an integer number (7541517).

Almost surely, 2^25138385 is an apocalyptic number.

It is an amenable number.

25138385 is a deficient number, since it is larger than the sum of its proper divisors (5027683).

25138385 is an equidigital number, since it uses as much as digits as its factorization.

25138385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5027682.

The product of its digits is 28800, while the sum is 35.

The square root of 25138385 is about 5013.8194024117. The cubic root of 25138385 is about 292.9403016442.

The spelling of 25138385 in words is "twenty-five million, one hundred thirty-eight thousand, three hundred eighty-five".