25785841 has 2 divisors, whose sum is σ = 25785842. Its totient is φ = 25785840.

The previous prime is 25785839. The next prime is 25785857. The reversal of 25785841 is 14858752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16200625 + 9585216 = 4025^2 + 3096^2 .

It is a cyclic number.

It is not a de Polignac number, because 25785841 - 2¹ = 25785839 is a prime.

Together with 25785839, it forms a pair of twin primes.

It is a nialpdrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 25785794 and 25785803.

It is not a weakly prime, because it can be changed into another prime (25785811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12892920 + 12892921.

It is an arithmetic number, because the mean of its divisors is an integer number (12892921).

Almost surely, 2^25785841 is an apocalyptic number.

It is an amenable number.

25785841 is a deficient number, since it is larger than the sum of its proper divisors (1).

25785841 is an equidigital number, since it uses as much as digits as its factorization.

25785841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 89600, while the sum is 40.

The square root of 25785841 is about 5077.9760732008. The cubic root of 25785841 is about 295.4339720184.

The spelling of 25785841 in words is "twenty-five million, seven hundred eighty-five thousand, eight hundred forty-one".