25918259 has 2 divisors, whose sum is σ = 25918260. Its totient is φ = 25918258.

The previous prime is 25918247. The next prime is 25918283. The reversal of 25918259 is 95281952.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25918259 - 2⁸ = 25918003 is a prime.

It is a super-2 number, since 2×25918259² = 1343512299182162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25918859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12959129 + 12959130.

It is an arithmetic number, because the mean of its divisors is an integer number (12959130).

Almost surely, 2^25918259 is an apocalyptic number.

25918259 is a deficient number, since it is larger than the sum of its proper divisors (1).

25918259 is an equidigital number, since it uses as much as digits as its factorization.

25918259 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64800, while the sum is 41.

The square root of 25918259 is about 5090.9978393238. The cubic root of 25918259 is about 295.9388227293.

The spelling of 25918259 in words is "twenty-five million, nine hundred eighteen thousand, two hundred fifty-nine".