25705385 has 8 divisors (see below), whose sum is σ = 32470080. Its totient is φ = 19481904.

The previous prime is 25705373. The next prime is 25705387. The reversal of 25705385 is 58350752.

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 25705385 - 2⁴ = 25705369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25705387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135197 + ... + 135386.

It is an arithmetic number, because the mean of its divisors is an integer number (4058760).

Almost surely, 2^25705385 is an apocalyptic number.

It is an amenable number.

25705385 is a deficient number, since it is larger than the sum of its proper divisors (6764695).

25705385 is a wasteful number, since it uses less digits than its factorization.

25705385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270607.

The product of its (nonzero) digits is 42000, while the sum is 35.

The square root of 25705385 is about 5070.0478301491. The cubic root of 25705385 is about 295.1263846091.

The spelling of 25705385 in words is "twenty-five million, seven hundred five thousand, three hundred eighty-five".