25508641 has 2 divisors, whose sum is σ = 25508642. Its totient is φ = 25508640.

The previous prime is 25508597. The next prime is 25508647. The reversal of 25508641 is 14680552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24059025 + 1449616 = 4905^2 + 1204^2 .

It is a cyclic number.

It is not a de Polignac number, because 25508641 - 2¹⁹ = 24984353 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25508647) 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, 12754320 + 12754321.

It is an arithmetic number, because the mean of its divisors is an integer number (12754321).

Almost surely, 2^25508641 is an apocalyptic number.

It is an amenable number.

25508641 is a deficient number, since it is larger than the sum of its proper divisors (1).

25508641 is an equidigital number, since it uses as much as digits as its factorization.

25508641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 25508641 is about 5050.6079832036. The cubic root of 25508641 is about 294.3715088471.

The spelling of 25508641 in words is "twenty-five million, five hundred eight thousand, six hundred forty-one".