25558241 has 2 divisors, whose sum is σ = 25558242. Its totient is φ = 25558240.

The previous prime is 25558223. The next prime is 25558261. The reversal of 25558241 is 14285552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13104400 + 12453841 = 3620^2 + 3529^2 .

It is a cyclic number.

It is not a de Polignac number, because 25558241 - 2¹⁸ = 25296097 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 25558198 and 25558207.

It is not a weakly prime, because it can be changed into another prime (25558201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12779120 + 12779121.

It is an arithmetic number, because the mean of its divisors is an integer number (12779121).

Almost surely, 2^25558241 is an apocalyptic number.

It is an amenable number.

25558241 is a deficient number, since it is larger than the sum of its proper divisors (1).

25558241 is an equidigital number, since it uses as much as digits as its factorization.

25558241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16000, while the sum is 32.

The square root of 25558241 is about 5055.5158985014. The cubic root of 25558241 is about 294.5621811448.

The spelling of 25558241 in words is "twenty-five million, five hundred fifty-eight thousand, two hundred forty-one".