25865611 has 2 divisors, whose sum is σ = 25865612. Its totient is φ = 25865610.

The previous prime is 25865597. The next prime is 25865617. The reversal of 25865611 is 11656852.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25865611 is a prime.

It is not a weakly prime, because it can be changed into another prime (25865617) 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, 12932805 + 12932806.

It is an arithmetic number, because the mean of its divisors is an integer number (12932806).

Almost surely, 2^25865611 is an apocalyptic number.

25865611 is a deficient number, since it is larger than the sum of its proper divisors (1).

25865611 is an equidigital number, since it uses as much as digits as its factorization.

25865611 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14400, while the sum is 34.

The square root of 25865611 is about 5085.8245152581. The cubic root of 25865611 is about 295.7383058051.

The spelling of 25865611 in words is "twenty-five million, eight hundred sixty-five thousand, six hundred eleven".