25825861 has 2 divisors, whose sum is σ = 25825862. Its totient is φ = 25825860.

The previous prime is 25825847. The next prime is 25825871. The reversal of 25825861 is 16852852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21390625 + 4435236 = 4625^2 + 2106^2 .

It is a cyclic number.

It is not a de Polignac number, because 25825861 - 2⁵ = 25825829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25825861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25825871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12912930 + 12912931.

It is an arithmetic number, because the mean of its divisors is an integer number (12912931).

Almost surely, 2^25825861 is an apocalyptic number.

It is an amenable number.

25825861 is a deficient number, since it is larger than the sum of its proper divisors (1).

25825861 is an equidigital number, since it uses as much as digits as its factorization.

25825861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38400, while the sum is 37.

The square root of 25825861 is about 5081.9150917740. The cubic root of 25825861 is about 295.5867322897.

The spelling of 25825861 in words is "twenty-five million, eight hundred twenty-five thousand, eight hundred sixty-one".