25778265 has 8 divisors (see below), whose sum is σ = 41245248. Its totient is φ = 13748400.

The previous prime is 25778257. The next prime is 25778279. The reversal of 25778265 is 56287752.

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

It is not a de Polignac number, because 25778265 - 2³ = 25778257 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 859261 + ... + 859290.

It is an arithmetic number, because the mean of its divisors is an integer number (5155656).

Almost surely, 2^25778265 is an apocalyptic number.

It is an amenable number.

25778265 is a deficient number, since it is larger than the sum of its proper divisors (15466983).

25778265 is a wasteful number, since it uses less digits than its factorization.

25778265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1718559.

The product of its digits is 235200, while the sum is 42.

The square root of 25778265 is about 5077.2300519082. The cubic root of 25778265 is about 295.4050358927.

The spelling of 25778265 in words is "twenty-five million, seven hundred seventy-eight thousand, two hundred sixty-five".