25685873 has 2 divisors, whose sum is σ = 25685874. Its totient is φ = 25685872.

The previous prime is 25685839. The next prime is 25685893. The reversal of 25685873 is 37858652.

25685873 is nontrivially palindromic in base 14.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19070689 + 6615184 = 4367^2 + 2572^2 .

It is a cyclic number.

It is not a de Polignac number, because 25685873 - 2⁸ = 25685617 is a prime.

It is not a weakly prime, because it can be changed into another prime (25685813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12842936 + 12842937.

It is an arithmetic number, because the mean of its divisors is an integer number (12842937).

Almost surely, 2^25685873 is an apocalyptic number.

It is an amenable number.

25685873 is a deficient number, since it is larger than the sum of its proper divisors (1).

25685873 is an equidigital number, since it uses as much as digits as its factorization.

25685873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 403200, while the sum is 44.

The square root of 25685873 is about 5068.1232226535. The cubic root of 25685873 is about 295.0516925597.

The spelling of 25685873 in words is "twenty-five million, six hundred eighty-five thousand, eight hundred seventy-three".