25982257 has 4 divisors (see below), whose sum is σ = 29694016. Its totient is φ = 22270500.

The previous prime is 25982227. The next prime is 25982261. The reversal of 25982257 is 75228952.

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 not a de Polignac number, because 25982257 - 2¹¹ = 25980209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25982207) 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, 1855869 + ... + 1855882.

It is an arithmetic number, because the mean of its divisors is an integer number (7423504).

Almost surely, 2^25982257 is an apocalyptic number.

It is an amenable number.

25982257 is a deficient number, since it is larger than the sum of its proper divisors (3711759).

25982257 is an equidigital number, since it uses as much as digits as its factorization.

25982257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3711758.

The product of its digits is 100800, while the sum is 40.

The square root of 25982257 is about 5097.2793723711. The cubic root of 25982257 is about 296.1822023162.

The spelling of 25982257 in words is "twenty-five million, nine hundred eighty-two thousand, two hundred fifty-seven".