25270985 has 4 divisors (see below), whose sum is σ = 30325188. Its totient is φ = 20216784.

The previous prime is 25270979. The next prime is 25270991. The reversal of 25270985 is 58907252.

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

It is an interprime number because it is at equal distance from previous prime (25270979) and next prime (25270991).

It can be written as a sum of positive squares in 2 ways, for example, as 9174841 + 16096144 = 3029^2 + 4012^2 .

It is a cyclic number.

It is not a de Polignac number, because 25270985 - 2²⁰ = 24222409 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2527094 + ... + 2527103.

It is an arithmetic number, because the mean of its divisors is an integer number (7581297).

Almost surely, 2^25270985 is an apocalyptic number.

It is an amenable number.

25270985 is a deficient number, since it is larger than the sum of its proper divisors (5054203).

25270985 is an equidigital number, since it uses as much as digits as its factorization.

25270985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5054202.

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 25270985 is about 5027.0254624380. The cubic root of 25270985 is about 293.4544660122.

The spelling of 25270985 in words is "twenty-five million, two hundred seventy thousand, nine hundred eighty-five".