25694161 has 2 divisors, whose sum is σ = 25694162. Its totient is φ = 25694160.

The previous prime is 25694153. The next prime is 25694171. The reversal of 25694161 is 16149652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23232400 + 2461761 = 4820^2 + 1569^2 .

It is a cyclic number.

It is not a de Polignac number, because 25694161 - 2³ = 25694153 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (25694111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12847080 + 12847081.

It is an arithmetic number, because the mean of its divisors is an integer number (12847081).

Almost surely, 2^25694161 is an apocalyptic number.

It is an amenable number.

25694161 is a deficient number, since it is larger than the sum of its proper divisors (1).

25694161 is an equidigital number, since it uses as much as digits as its factorization.

25694161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 34.

The square root of 25694161 is about 5068.9408163836. The cubic root of 25694161 is about 295.0834236915.

The spelling of 25694161 in words is "twenty-five million, six hundred ninety-four thousand, one hundred sixty-one".