25591859 has 2 divisors, whose sum is σ = 25591860. Its totient is φ = 25591858.

The previous prime is 25591849. The next prime is 25591871. The reversal of 25591859 is 95819552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25591859 - 2⁴ = 25591843 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25591849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12795929 + 12795930.

It is an arithmetic number, because the mean of its divisors is an integer number (12795930).

Almost surely, 2^25591859 is an apocalyptic number.

25591859 is a deficient number, since it is larger than the sum of its proper divisors (1).

25591859 is an equidigital number, since it uses as much as digits as its factorization.

25591859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 162000, while the sum is 44.

The square root of 25591859 is about 5058.8396890987. The cubic root of 25591859 is about 294.6912752244.

The spelling of 25591859 in words is "twenty-five million, five hundred ninety-one thousand, eight hundred fifty-nine".