25785849 has 4 divisors (see below), whose sum is σ = 34381136. Its totient is φ = 17190564.

The previous prime is 25785841. The next prime is 25785857. The reversal of 25785849 is 94858752.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (25785841) and next prime (25785857).

It is not a de Polignac number, because 25785849 - 2³ = 25785841 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25785798 and 25785807.

It is not an unprimeable number, because it can be changed into a prime (25785841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4297639 + ... + 4297644.

It is an arithmetic number, because the mean of its divisors is an integer number (8595284).

Almost surely, 2^25785849 is an apocalyptic number.

It is an amenable number.

25785849 is a deficient number, since it is larger than the sum of its proper divisors (8595287).

25785849 is an equidigital number, since it uses as much as digits as its factorization.

25785849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8595286.

The product of its digits is 806400, while the sum is 48.

The square root of 25785849 is about 5077.9768609162. The cubic root of 25785849 is about 295.4340025710.

The spelling of 25785849 in words is "twenty-five million, seven hundred eighty-five thousand, eight hundred forty-nine".