25847161 has 2 divisors, whose sum is σ = 25847162. Its totient is φ = 25847160.

The previous prime is 25847131. The next prime is 25847177. The reversal of 25847161 is 16174852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23222761 + 2624400 = 4819^2 + 1620^2 .

It is a cyclic number.

It is not a de Polignac number, because 25847161 - 2²¹ = 23750009 is a prime.

It is not a weakly prime, because it can be changed into another prime (25847131) 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, 12923580 + 12923581.

It is an arithmetic number, because the mean of its divisors is an integer number (12923581).

Almost surely, 2^25847161 is an apocalyptic number.

It is an amenable number.

25847161 is a deficient number, since it is larger than the sum of its proper divisors (1).

25847161 is an equidigital number, since it uses as much as digits as its factorization.

25847161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13440, while the sum is 34.

The square root of 25847161 is about 5084.0103265041. The cubic root of 25847161 is about 295.6679721408.

The spelling of 25847161 in words is "twenty-five million, eight hundred forty-seven thousand, one hundred sixty-one".