25805771 has 2 divisors, whose sum is σ = 25805772. Its totient is φ = 25805770.

The previous prime is 25805729. The next prime is 25805777. The reversal of 25805771 is 17750852.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25805771 - 2⁶ = 25805707 is a prime.

It is not a weakly prime, because it can be changed into another prime (25805777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12902885 + 12902886.

It is an arithmetic number, because the mean of its divisors is an integer number (12902886).

Almost surely, 2^25805771 is an apocalyptic number.

25805771 is a deficient number, since it is larger than the sum of its proper divisors (1).

25805771 is an equidigital number, since it uses as much as digits as its factorization.

25805771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19600, while the sum is 35.

The square root of 25805771 is about 5079.9380901739. The cubic root of 25805771 is about 295.5100665278.

The spelling of 25805771 in words is "twenty-five million, eight hundred five thousand, seven hundred seventy-one".