25865911 has 2 divisors, whose sum is σ = 25865912. Its totient is φ = 25865910.

The previous prime is 25865887. The next prime is 25865921. The reversal of 25865911 is 11956852.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25865911 - 2²³ = 17477303 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25865921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12932955 + 12932956.

It is an arithmetic number, because the mean of its divisors is an integer number (12932956).

Almost surely, 2^25865911 is an apocalyptic number.

25865911 is a deficient number, since it is larger than the sum of its proper divisors (1).

25865911 is an equidigital number, since it uses as much as digits as its factorization.

25865911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600, while the sum is 37.

The square root of 25865911 is about 5085.8540089153. The cubic root of 25865911 is about 295.7394491655.

The spelling of 25865911 in words is "twenty-five million, eight hundred sixty-five thousand, nine hundred eleven".