25872617 has 2 divisors, whose sum is σ = 25872618. Its totient is φ = 25872616.

The previous prime is 25872577. The next prime is 25872619. The reversal of 25872617 is 71627852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20939776 + 4932841 = 4576^2 + 2221^2 .

It is a cyclic number.

It is not a de Polignac number, because 25872617 - 2²² = 21678313 is a prime.

Together with 25872619, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25872619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12936308 + 12936309.

It is an arithmetic number, because the mean of its divisors is an integer number (12936309).

Almost surely, 2^25872617 is an apocalyptic number.

It is an amenable number.

25872617 is a deficient number, since it is larger than the sum of its proper divisors (1).

25872617 is an equidigital number, since it uses as much as digits as its factorization.

25872617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47040, while the sum is 38.

The square root of 25872617 is about 5086.5132458296. The cubic root of 25872617 is about 295.7650047753.

The spelling of 25872617 in words is "twenty-five million, eight hundred seventy-two thousand, six hundred seventeen".