25772161 has 2 divisors, whose sum is σ = 25772162. Its totient is φ = 25772160.

The previous prime is 25772147. The next prime is 25772171. The reversal of 25772161 is 16127752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23338561 + 2433600 = 4831^2 + 1560^2 .

It is a cyclic number.

It is not a de Polignac number, because 25772161 - 2⁹ = 25771649 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25772101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12886080 + 12886081.

It is an arithmetic number, because the mean of its divisors is an integer number (12886081).

Almost surely, 2^25772161 is an apocalyptic number.

It is an amenable number.

25772161 is a deficient number, since it is larger than the sum of its proper divisors (1).

25772161 is an equidigital number, since it uses as much as digits as its factorization.

25772161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5880, while the sum is 31.

The square root of 25772161 is about 5076.6289011508. The cubic root of 25772161 is about 295.3817178678.

The spelling of 25772161 in words is "twenty-five million, seven hundred seventy-two thousand, one hundred sixty-one".