25689049 has 8 divisors (see below), whose sum is σ = 26818560. Its totient is φ = 24578400.

The previous prime is 25689043. The next prime is 25689067. The reversal of 25689049 is 94098652.

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 25689049 - 2¹⁷ = 25557977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25688996 and 25689014.

It is not an unprimeable number, because it can be changed into a prime (25689043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1897 + ... + 7414.

It is an arithmetic number, because the mean of its divisors is an integer number (3352320).

Almost surely, 2^25689049 is an apocalyptic number.

It is an amenable number.

25689049 is a deficient number, since it is larger than the sum of its proper divisors (1129511).

25689049 is an equidigital number, since it uses as much as digits as its factorization.

25689049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9431.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 25689049 is about 5068.4365439453. The cubic root of 25689049 is about 295.0638528830.

The spelling of 25689049 in words is "twenty-five million, six hundred eighty-nine thousand, forty-nine".