25825985 has 8 divisors (see below), whose sum is σ = 31163496. Its totient is φ = 20545920.

The previous prime is 25825981. The next prime is 25825991. The reversal of 25825985 is 58952852.

It can be written as a sum of positive squares in 4 ways, for example, as 1343281 + 24482704 = 1159^2 + 4948^2 .

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

It is not a de Polignac number, because 25825985 - 2² = 25825981 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25825981) 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, 13364 + ... + 15173.

It is an arithmetic number, because the mean of its divisors is an integer number (3895437).

Almost surely, 2^25825985 is an apocalyptic number.

It is an amenable number.

25825985 is a deficient number, since it is larger than the sum of its proper divisors (5337511).

25825985 is a wasteful number, since it uses less digits than its factorization.

25825985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28723.

The product of its digits is 288000, while the sum is 44.

The square root of 25825985 is about 5081.9272918844. The cubic root of 25825985 is about 295.5872053646.

The spelling of 25825985 in words is "twenty-five million, eight hundred twenty-five thousand, nine hundred eighty-five".