25868257 has 4 divisors (see below), whose sum is σ = 25881856. Its totient is φ = 25854660.

The previous prime is 25868233. The next prime is 25868279. The reversal of 25868257 is 75286852.

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 a cyclic number.

It is not a de Polignac number, because 25868257 - 2¹¹ = 25866209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25868287) 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, 3369 + ... + 7942.

It is an arithmetic number, because the mean of its divisors is an integer number (6470464).

Almost surely, 2^25868257 is an apocalyptic number.

It is an amenable number.

25868257 is a deficient number, since it is larger than the sum of its proper divisors (13599).

25868257 is a wasteful number, since it uses less digits than its factorization.

25868257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13598.

The product of its digits is 268800, while the sum is 43.

The square root of 25868257 is about 5086.0846434168. The cubic root of 25868257 is about 295.7483899393.

The spelling of 25868257 in words is "twenty-five million, eight hundred sixty-eight thousand, two hundred fifty-seven".