25089521 has 2 divisors, whose sum is σ = 25089522. Its totient is φ = 25089520.

The previous prime is 25089479. The next prime is 25089523. The reversal of 25089521 is 12598052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24010000 + 1079521 = 4900^2 + 1039^2 .

It is a cyclic number.

It is not a de Polignac number, because 25089521 - 2⁶ = 25089457 is a prime.

It is a Sophie Germain prime.

Together with 25089523, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (25089523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12544760 + 12544761.

It is an arithmetic number, because the mean of its divisors is an integer number (12544761).

Almost surely, 2^25089521 is an apocalyptic number.

It is an amenable number.

25089521 is a deficient number, since it is larger than the sum of its proper divisors (1).

25089521 is an equidigital number, since it uses as much as digits as its factorization.

25089521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 25089521 is about 5008.9441003070. The cubic root of 25089521 is about 292.7503727154.

The spelling of 25089521 in words is "twenty-five million, eighty-nine thousand, five hundred twenty-one".