25609541 has 2 divisors, whose sum is σ = 25609542. Its totient is φ = 25609540.

The previous prime is 25609537. The next prime is 25609559. The reversal of 25609541 is 14590652.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21390625 + 4218916 = 4625^2 + 2054^2 .

It is a cyclic number.

It is not a de Polignac number, because 25609541 - 2² = 25609537 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 25609498 and 25609507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25609561) 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, 12804770 + 12804771.

It is an arithmetic number, because the mean of its divisors is an integer number (12804771).

Almost surely, 2^25609541 is an apocalyptic number.

It is an amenable number.

25609541 is a deficient number, since it is larger than the sum of its proper divisors (1).

25609541 is an equidigital number, since it uses as much as digits as its factorization.

25609541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 25609541 is about 5060.5870212852. The cubic root of 25609541 is about 294.7591292441.

The spelling of 25609541 in words is "twenty-five million, six hundred nine thousand, five hundred forty-one".