25705985 has 8 divisors (see below), whose sum is σ = 30912000. Its totient is φ = 20521584.

The previous prime is 25705969. The next prime is 25705987. The reversal of 25705985 is 58950752.

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 25705985 - 2⁴ = 25705969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25705987) 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, 2657 + ... + 7646.

It is an arithmetic number, because the mean of its divisors is an integer number (3864000).

Almost surely, 2^25705985 is an apocalyptic number.

It is an amenable number.

25705985 is a deficient number, since it is larger than the sum of its proper divisors (5206015).

25705985 is a wasteful number, since it uses less digits than its factorization.

25705985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10807.

The product of its (nonzero) digits is 126000, while the sum is 41.

The square root of 25705985 is about 5070.1070008433. The cubic root of 25705985 is about 295.1286808135.

The spelling of 25705985 in words is "twenty-five million, seven hundred five thousand, nine hundred eighty-five".