25560289 has 2 divisors, whose sum is σ = 25560290. Its totient is φ = 25560288.

The previous prime is 25560259. The next prime is 25560307. The reversal of 25560289 is 98206552.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21316689 + 4243600 = 4617^2 + 2060^2 .

It is a cyclic number.

It is not a de Polignac number, because 25560289 - 2⁹ = 25559777 is a prime.

It is not a weakly prime, because it can be changed into another prime (25560259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12780144 + 12780145.

It is an arithmetic number, because the mean of its divisors is an integer number (12780145).

Almost surely, 2^25560289 is an apocalyptic number.

It is an amenable number.

25560289 is a deficient number, since it is larger than the sum of its proper divisors (1).

25560289 is an equidigital number, since it uses as much as digits as its factorization.

25560289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 25560289 is about 5055.7184454833. The cubic root of 25560289 is about 294.5700487603.

The spelling of 25560289 in words is "twenty-five million, five hundred sixty thousand, two hundred eighty-nine".