25765849 has 4 divisors (see below), whose sum is σ = 25776436. Its totient is φ = 25755264.

The previous prime is 25765837. The next prime is 25765853. The reversal of 25765849 is 94856752.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 3610000 + 22155849 = 1900^2 + 4707^2 .

It is a cyclic number.

It is not a de Polignac number, because 25765849 - 2¹³ = 25757657 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25765799 and 25765808.

It is not an unprimeable number, because it can be changed into a prime (25765879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 397 + ... + 7189.

It is an arithmetic number, because the mean of its divisors is an integer number (6444109).

Almost surely, 2^25765849 is an apocalyptic number.

It is an amenable number.

25765849 is a deficient number, since it is larger than the sum of its proper divisors (10587).

25765849 is an equidigital number, since it uses as much as digits as its factorization.

25765849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10586.

The product of its digits is 604800, while the sum is 46.

The square root of 25765849 is about 5076.0071906962. The cubic root of 25765849 is about 295.3576013850.

The spelling of 25765849 in words is "twenty-five million, seven hundred sixty-five thousand, eight hundred forty-nine".