25860049 has 2 divisors, whose sum is σ = 25860050. Its totient is φ = 25860048.

The previous prime is 25860047. The next prime is 25860091. The reversal of 25860049 is 94006852.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14197824 + 11662225 = 3768^2 + 3415^2 .

It is a cyclic number.

It is not a de Polignac number, because 25860049 - 2¹ = 25860047 is a prime.

Together with 25860047, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 25859996 and 25860023.

It is not a weakly prime, because it can be changed into another prime (25860047) 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, 12930024 + 12930025.

It is an arithmetic number, because the mean of its divisors is an integer number (12930025).

Almost surely, 2^25860049 is an apocalyptic number.

It is an amenable number.

25860049 is a deficient number, since it is larger than the sum of its proper divisors (1).

25860049 is an equidigital number, since it uses as much as digits as its factorization.

25860049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 25860049 is about 5085.2776718681. The cubic root of 25860049 is about 295.7171063011.

The spelling of 25860049 in words is "twenty-five million, eight hundred sixty thousand, forty-nine".